detailed examination of the elements or structure of something

The answer is: An analysis.

Explanation:

When we analyse something, we study it, we think deeply about, we put the cons and pros, we balance the information we have, in other words; we examine. Is a process in which we study the relations, nature, its features to come up with a decision or answer. It takes its time.

the president was the speaker and it was a great part of history.

explanation:

video of the national aeronautic space administration's (nasa) coverage of president john f. kennedy’s address at rice university, houston, texas, concerning the nation's efforts in space exploration. in his speech the president discusses the necessity for the united states to become an international leader in space exploration and famously states, "we choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard."