They are always microscopic. They are closer to the sun than to Earth. They are made of soft, spongy materials. They burn up high in Earth's atmosphere
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: At certain times of the year, meteor showers can be observed from Earth. Why are these objects from space usually harmless?
Possibilities:
- They are always microscopic.
- They are closer to the sun than to Earth.
- They are made of soft, spongy materials.
- They burn up high in Earth's atmosphere

They burn up high in Earth's atmosphere