Which idea is most directly related to lamarck’s beliefs about evolution?

a frog’s legs grow during life to it jump farther, and it passes on the longer legs to its offspring.
humans and primates are classified in the same genus because they have similar traits.
if a population is left to reproduce without limiting factors, it will outgrow its food supply.
in one area, brown moths are better adapted to the environment than white moths, so they survive and reproduce.

The correct answer is "A frog’s legs grow during life to help it jump farther, and it passes on the longer legs to its offspring".

Explanation:

The Lamarck’s beliefs about evolution, also known as Lamarckism, is the hypothesis that a living organism can pass the characteristics acquired through its lifespan to its offspring. The idea that a frog that grow its legs as a positive adaptation during life and passes on the longer legs to its offspring is an example of Lamarckism. This hypothesis has been disproved by the discovery of how inheritance works trough the laws of genetics.