Your roommate, who has not studied climate, says, "i thought the greenhouse effect was a bad thing. isn't it what's causing global warming? " which of the following statements might you use to your roommate understand the true nature of the greenhouse effect? select the two that apply.

a. some gases, like carbon dioxide and water vapor, "trap" the heat radiated by earth, causing warming.
b. earth would be more livable without the greenhouse effect.
c. when there are more greenhouse gases in the atmosphere, the greenhouse effect is stronger.
d. carbon dioxide is the only greenhouse gas that matters.

Option (A) and (C).

Explanation:

Greenhouse effect increases the earth's temperature every year. This causes the melting of glaciers and causes flood situation in the plain areas and allows the persistence of harmful gases in the atmosphere.

Greenhouse gases has the ability to trap the heat of the sun radiated by the planet. These greenhouse gases includes carbon dioxide, carbon monoxide, water vapor and methane. These green house gases increases the effect of the greenhouse.

Thus, the correct answer is option (A) and (C).

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.