If ted were conducting research on things that harm the environment, what definition would be included? a) biomass b) acid rain c) ecosystems d) afforestation

The correct answer is acid rain.

Acid rain - characterized as containing harmful levels of sulfur dioxide or nitrogen oxide; acid rain is damaging and potentially deadly to the earth's fragile ecosystems; acidity is measured using the pH scale where 7 is neutral, values greater than 7 are considered alkaline, and values below 5.6 are considered acid precipitation; note - a pH of 2.4 (the acidity of vinegar) has been measured in rainfall in New England.

CIA World Factbook Notes and Definitions  

CIA World Factbook

i guess the cause and effect would show how being around the smoke(the cause) can have negative effects on the body.

explanation:

is it "means of nourishment"