Partial reinforcement schedules occur in a variety of environments both natural and man-made—they may be purposefully devised or be merely coincidental. There are differences in rates of extinction produced by CRF (relatively rapid) and PRF (relatively slow) schedules of reinforcement. Explain how resistance to extinction (slow extinction) is adaptive for wild animals (and maybe humans too)—how does this better enable them and us to survive?

because they want 2 and yea

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explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.