The answer is C. They destroy the ozone layer
The answer is ice water, since the particles of a solid have very low kinetic energy.
The earth’s climate is changing because of human impact. For example, because of our extensive use of cars and fossil fuels, the carbon dioxide builds up in the atmosphere. When that happens, it creates a “blanket” trapping in heat and that makes the temperature rises.
There ain’t much context but I would say D. Because it expands the food chain to the 3rd consumer which, in my opinion, would complete an ecosystem