Answer:
If a spacecraft is in space for a long time, radiation is a problem. Designers must figure out a way to protect astronauts from the radiation.
Answer:
Types of aid
Bilateral aid (also known as 'tied aid') - the country receiving the aid must spend the money on goods and services from the country providing it.
Multilateral aid - high-income countries donate money through organisations such as the United Nations (UN) and the World Bank.
Explanation:
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