Answer:
B. the wind tunnel must be run by highly skilled workers.
correct me po if imma wrong ^-^
High concentration and passive transport
For starters, humans have feelings and cells. If we get hurt we can feel things such as pain unlike a tent. If you hit a tent there is nothing it feels because it has no feelings. We have cells all through our body and rocks don't. They are made of other stuff but not cells.
Answer:
The answer to your question is D, Sugar
Answer:
Because they represent the leftover building blocks of the solar system-scientists can study these and learn about the composition of the solar system.
