Answer: I think it's A
Explanation: Becasue I took the assighnment

The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. The absorbed energy warms the atmosphere and the surface of the Earth.
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Answer:
Because females have two x but males have x and y so deleting x would only leave it with x without a y
Explanation:
because
Non polar molecule move across a membrane through simple diffusion, when moving up their concentration gradient. Simple diffusion involves movement of molecules through a membrane without the help of integral membrane protein. These molecules are driven by the force of diffusion. This is different from facilitated diffusion where molecules only move with the aid of integral protein in the membrane.
Animals take oxygen from the air and exhale carbon dioxide. Plants use this carbon dioxide and release oxygen into the air. ... Photosynthesis is important to living organisms because it is plants that ultimately serve as a foundation for the food web by providing a major source of food for other living organisms.