Question

greenhouse gases, such as carbon dioxide and methane,________. choose one option a hold heat in the atmosphere b help flowers grow in dry places c help water flow from place to place d are emitted by trees and other plants

Explanation:

Greenhouse gases like carbon dioxide and methane trap heat in the atmosphere. Trees and plants absorb carbon dioxide (not emit it as in option D). There is no relation to helping flowers grow in dry places (option B) or water flow (option C).

Answer:

A. hold heat in the atmosphere