Differentiate between internal fertilization and external fertilization​

Explanation:

internal fertilization=Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body. ... Following fertilization, the embryos are laid as eggs in oviparous organisms, or continue to develop inside the reproductive tract of the mother to be born later as live young in viviparous organisms.

External fertilization=External fertilization is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. It is contrasted with internal fertilization, in which sperm are introduced via insemination and then combine with an egg inside the body of a female organism

here is your answer

please mark as brainleist

preservation because he preserves part of the land and preserves means save

explanation:

the answer is b.) hydrogen bonds between bases.