Which statement identifies the central idea of the text? a. many parents put their children at risk by allowing them to return to sports too early after a concussion. b. people who experience a second concussion not long after the first experience more extensive damage. c. younger children are particularly vulnerable to concussions because of the state of their developing brain. d. doctors still don't know enough about concussions to prescribe any suggested form of treatment or rehabilitation.

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."

1 click on your profile

2 go to edit profile

3 the last choice is profile picture, click that

free points are committed here! first to answer by writing this question and post it as an answer gets brainliest and everybody gets 30 !