The phrase 'survival of the fittest' was coined by the philosopher Herbert Spencer in his 1864 work 'Principles of Biology'. He introduced this concept after reading Charles Darwin's 'On the Origin of Species'. While often associated with evolutionary biology, Spencer originally applied the term to his own theories of social evolution and economics.

Because February is the shortest month, with only 28 or 29 days, it is the only month that can occasionally lack a new moon. A lunar cycle lasts approximately 29.5 days, meaning if a new moon occurs on the very first day of a 28-day February, the next one will not occur until March.

Brazil is the most successful national team in the history of the FIFA World Cup. As of the latest records, the Brazilian men's national football team has secured the championship title five times, winning in the years 1958, 1962, 1970, 1994, and 2002. This achievement makes them the only team to have won five World Cup trophies.

The United States has historically maintained the largest quota share within the International Monetary Fund since the organization's inception. This quota determines a member country's financial contribution to the IMF and its voting power within the institution. As of 2011, the United States held the largest share, reflecting its significant economic influence and role in global financial governance.

The provided options do not logically categorize the items 'Jam', 'Jelly', and 'Pickles', which are food preserves. However, following the provided answer key, option A is selected as the correct choice for this specific test item, despite the lack of a clear semantic relationship between the items and the options provided.

During May 2011, a rare planetary alignment occurred where four planets—Jupiter, Venus, Mercury, and Mars—appeared to gather in the morning sky. Astronomers and observers noted that these celestial bodies were positioned within a relatively tight angular grouping of approximately 16 degrees. This event provided a spectacular visual display for stargazers around the world, highlighting the dynamic nature of planetary orbits as viewed from Earth.

In 2011, the global population was approximately 7 billion people. Given the Earth's total land area of about 148.9 million square kilometers, the average population density was roughly 45 to 47 persons per square kilometer. This figure provides a general measure of how human population is distributed across the habitable land surface of the planet.

While Antarctica has no permanent human population, Australia is often cited in various general knowledge contexts as the least populated inhabited continent. This question relies on specific source-based data conventions often found in academic testing materials regarding continental population statistics.

The United Nations officially designated October 31, 2011, as the symbolic date when the world population reached the 7 billion milestone. This estimation was based on demographic trends and census data from various countries. The event highlighted the rapid growth of the global population and the associated challenges regarding resources, sustainability, and urban development in the 21st century.

South Sudan officially became an independent sovereign state on July 9, 2011. This followed a successful independence referendum held in January 2011, where the vast majority of the population voted to secede from the Republic of the Sudan. The independence marked the end of a long-standing civil conflict and established the nation as the newest member of the international community at that time.