Answer:
Body systems are used throughout your body to help you move and to live like the heart for example.
Answer:
The answer is- A). Because it takes tremendous effort to break free from the laws of gravity to exit the Earth's atmosphere.
Explanation:
I really don't have an explanation. Except that I love science and I actually pay attention in my classes.
B) sunlight
Sunlight supports life by providing food and warmth which is needed for the population of practically anything on earth to survive
Down syndrome is caused by the nondisjuction of the chromosome 21.
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