Answer:
b
Explanation:
The answer is B becuase "where do people buy tools is not a scientific question, and neither is C.
Answer: <em>species diversity
</em>
<em>
</em>
<em>ecosystem diversity
</em>
<em>
</em>
<em>genetic diversity</em>
Answer:
the car with the normal gas.
Explanation:
control group is the part of an experiment that stays the same
The UV rays cause sun spots due to reaction from the radiation.