How are organisms grouped in an ecosystem?
a. by their movement
b. by how they get their energy
c. by how they migrate
d. by how they produce

a. autosomal.

explanation:

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

c. is the correct answer

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves