How did land whales eventually became aquatic?

Answer ASAP!!!

Adaptation and natural selection (survival of the fittest)

Explanation:

Whales used to have legs and walk on land but after years of their food sources becoming scarce, the whales adapted overtime to become aquatic mammals, where there is more food and a higher chance of survival.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.