According to the theory of evolution, amphibians evolved from ancient fish. which of these would best validate the theory? a. record of history of a place b. a study published by a research scholar c. record of temperature changes of a place b. a study crediting the theory by many scientists

B. a study crediting the theory by many scientists

Explanation:

A theory becomes a scientific law when it is repeatedly tested by several scientists around the world and same results are found by each of them and therefore, no point of conflict is left.

Similarly, the best way to validate a theory is by conducting the same study at different places. If several scientists credit the theory, it means that they have done enough investigation and research and found the theory appropriate.

Therefore, D is the best option.

Hope it help!

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.