I'd say D but i'm not 100% sure
Answer: here´s why
Explanation: Underneath the frozen upper layer, the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and ponds. If water is heated, its volume gradually decreases.
Answer:
Gregor Mendel
Explanation:
He was the first to describe how characteristics are passed down from generation to generation.
