Question

why external fertilization takes place in frogs and fish but not in humans​

Answer 1

Explanation:

$\huge\underline\bold\fcolorbox{black}{cyan}{Question}$why external fertilization takes place in frogs and fish but not in humans$\huge\sf\purple{Answer-:}$Sexual reproduction starts with the combination of a sperm and an egg in a process called fertilization. This can occur either inside (internal fertilization) or outside (external fertilization) the body of the female. Humans provide an example of the former whereas seahorse reproduction is an example of the latter.