Question

3. Which of the following groups of animals only uses internal fertilization? (1 point)

Answer 1

the following? :P

Answer 2

@GraceTrynaBeME ??

Answer 3

mollusks
amphibians
fishes
mammals

Answer 4

External fertilization = laying eggs
Internal fertilization = sex

Mollusk uses mostly external fertilization, some use internal.
Amphibians uses both external and internal fertilization
Fishes too use both.
Mammals mostly fertilize internally, some exceptions like platypus.

So i think the answer is Mammals.

Answer 5

THANKS OMG YOU'RE THE BEST! @thomaster

Answer 6

Glad i could help :)