The closest relatives of fungi are thought to be the
a. animals c. mosses
b. vascular plants d. slime molds

Option (A)

Explanation:

Fungus are the unicellular eukaryotic living organisms that are so small that it cannot be seen with our naked eye. It plays a significant role in decomposing the dead plants, animals, and other organic matters. They are present in both terrestrial as well as the aquatic environment.

Fungus are most closely related to the animals, because they both have similar characteristics.  

Fungus cannot prepare their own food like animals and they are considered to be heterotrophic. They can reproduce by the means of spores and their cells are comprised of nuclei with various numbers of chromosomes. These are the first unicellular organisms on earth from which the evolutionary processes has taken place and formed the present day complex multi-cellular organisms.

Thus, the correct answer is option (A).

b. the carbon cycle ensures living things have a source of hydrogen

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.