Which is an example of population density?
question 19 options:

country with a large population

maximum number of wolves in a forest

total number of alligators in florida

two jaguars per thousand hectares

b. regulated is the actual answer to your question.

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.

it is either c or d and i know for sure it is not a or b