Earth and the Moon are nearly the same age is the correct statement.

You can find the main idea of a paragraph in the: topic sentence.

Tiangong is a series of space stations to be launched by: China.

Neolithic communities brought about the rise of the first politicians.

In Plessy v. Ferguson (1896) the Supreme Court declared the "separate but equal" doctrine.

Deep knee bends can cause undue strain to the knees.

It was difficult for the United States to annex Texas because Texas was an independent nation. Texas freed itself from the sovereignty of Mexico and declared itself a Republic in 1836, and was formally recognized as such by the United States. Texas was finally annexed by the US in 1845.

The Great Compromise was the agreement that states: the lower house represented the people and the upper house represented the states.

The following might be elements in a story about someone who became a Senator including:
Terry attended a political rally at her local grocery store parking lot.

While still a junior in high school, Terry applied to be a page and an intern at the State legislation hoping one of the jobs would come through.

Terry volunteered on a local campaign stuffing envelopes and dropping leaflets from house to house.

Earth and the Moon are nearly the same age. -is the correct statement.

Lipids contains the most calories per gram.