Answer:
Embryological evidence
Step-by-step explanation:
Embryological evidence is the type of evidence being discussed in the given scenario.
Embryological evidence of evolution refers to the similarities and differences observed in the early stages of development between closely-related species. In the given scenario, two closely-related insect species are being studied in terms of how long it takes each to develop limb buds following fertilization. This is an example of embryological evidence of evolution because it is concerned with the early stages of development in these species and how they may have evolved from a common ancestor.
Other types of evidence of evolution include anatomical evidence, which refers to the similarities and differences in the physical characteristics of closely-related species, and molecular evidence, which refers to the similarities and differences in the DNA and other molecules that make up an organism's genetic material.