Most female frogs lay their eggs in water male frogs release there sperm into the water to fertilize the eggs this is an example of? a - internal fertilization - b - external fertilization - c - metamorphosis - d - alternation of generations. for answering i thought the answer was asexual but its not.

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

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