Question

read the passage
what is a spacewalk?
1 any time an astronaut gets out of a space vehicle, it is called an extravehicular activity, or eva. this is also called a spacewalk....
2 astronauts go on spacewalks for many reasons. spacewalks allow astronauts to work outside their spacecraft while still in space. one job astronauts do on a spacewalk is science experiments. experiments can be attached to the outside of a spacecraft to see how the space environment affects different things. astronauts place the experiments outside their spacecraft during a spacewalk. they go back outside to get the experiments when the tests are over.
3 astronauts also can test new equipment and make repairs to satellites or to their spacecraft while in orbit. by going on spacewalks, astronauts can repair equipment that might otherwise have to be brought back to earth for repair.
(from \what is a spacewalk?\ by nasa)
what is the main reason it is important for astronauts to go on spacewalks?
○ 1. spacewalks let astronauts extend their time on their spacecraft and in space.
○ 2. spacewalks allow astronauts to conduct research and repair their spacecraft.
○ 3. spacewalks help astronauts learn how long they can endure being outside their spacecraft.
○ 4. spacewalks prepare astronauts for different situations like having to leave their spacecraft.

Explanation:

The passage states spacewalks allow astronauts to do science experiments (research) and repair satellites/spacecraft. Option 2 directly matches these key purposes.

Answer:

1. Spacewalks allow astronauts to conduct research and repair their spacecraft.