Answer:
the answer is C.
Explanation: That is the answer, because we have to put a filter over it so we don't breath poisonous air.
Please give me brainliest
The answer is petrified fossils
Here are some of the things that I would like to look at:
-- the micro-organisms in pond water
-- human sperm
-- blood with fresh red cells in it
-- the torn edge of a piece of paper
-- a mosquito's head
-- sugar
-- salt
-- snow flakes
Confidence level=99.9%, degrees of freedom=24
