I honestly think it is D. Impulses.
An independent variable is something a Scientist messes with like baking soda and vinegar the independent variable is the baking soda and vinegar and the dependant variable is the explosion
A. a single chromosome that is not replicated
C
The definition of geologists is someone who studies the EARTH and its structure, how it's made etc.
The moon is not part of the earth so it is c.
I think the answer is how much money has been spent to fight the diseases caused by the mosquitos
