Question

1. what precautions must iss astronauts take?

Explanation:

ISS astronauts must take precautions such as radiation - shielding (due to space radiation), physical exercise to counteract muscle and bone loss in microgravity, and proper food and water management to maintain health. They also need to be prepared for emergency situations like equipment failures.

Answer:

Radiation - shielding, regular physical exercise, proper food and water management, emergency preparedness.