Which of the following statements is true?

organisms that evolve in the same environment often have homologous structures.
since there are gaps in the fossil record, it cannot be used as evidence for evolution.
human morphology and embryo development is very different from all other organisms.
the more similar the embryonic development of two species, the more closely they are related

The more similar the embryonic development of two species, the more closely they are related

Explanation:

According to the biogenetic law, the stages of embryological development of organisms of a species represents the stages of their evolution. Hence, if two organisms from two species share common or similar stages of embryonic development, they are supposed to be more closely related to each other in terms of evolution. It represents the embryological evidence of evolution and sets the phylogenetic relationship between species.