The shark is a fish while the dolphin is a mammal. these are two completely different types of animals, but they have similar characteristics due to their similar dwellings. these animals may have evolved their similarities by
adaptive radiation
convergent evolution
divergent evolution
coevolution

Convergent evolution. It refers to the type of evolution occurring in different species with similar traits. Another example is the wings of bat and insects.

Convergent evolution

Explanation:

When the organisms in the course of evolution, evolve to develop traits that are similar to each other even though they are not closely related to each other then such type of evolution is known as convergent evolution.Since both shark and dolphin are not closely related to each other but their characteristics have developed similarly because they have occupied similar habitats their evolution is convergent in nature.

You should provide a picture to show where the arrow is pointing and which information that is given. but there are 3 branches of the government, legislative, executive, and judicial. legislative makes laws, executives pass laws, and judicial are the courts