Explain how a greenhouse stays warmer than its outside.

Greenhouses stay warm because only some kinds of radiation penetrate their surfaces, which are glass and/or plastic. Solar radiation passes freely through clear substances such as greenhouses' glass and plastic, and it heats soil, stone, plants and anything else inside the greenhouses.

compost can be added to topsoil as a:

pesticide

thinking it would be d not too sure but i think it's right