Question

look at these details from a paragraph about the same topic: • to be prepared for problems in space, astronauts have to take many classes. • in life - size models of spacecraft, astronauts practice how theyll move in space. • to get used to working while feeling weightless, astronauts train in a large pool. choose the main, or central, idea that ties all the details together. astronauts complete a lot of training before going into space. astronauts learn how the international space station works. astronauts practice feeling weightless before they go into space.

Explanation:

The provided details all describe different types of preparation activities astronauts do: taking classes, practicing in spacecraft models, and training in a pool for weightlessness. The first option encompasses all these training activities, while the other two only cover narrow, specific parts of the preparation.

Answer:

Astronauts complete a lot of training before going into space.