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Answer 1

Frog eggs require moisture or they will dry up and die. Frogs lay their eggs coated in a jelly-like glycoprotein. The jelly helps keep the eggs from drying out, but must maintain contact with a moisture source.
the animals having external fertilization produce large no.of eggs Because The presence of the fertilized eggs and developing young in the water provides opportunities for predation, resulting in a loss of offspring. Therefore, millions of eggs must be produced by individuals.