Which of the following statements is true?
parts of an ecosystem only include biotic factors such as plants and animals.
if a common plant in an ecosystem becomes diseased, the ecosystem may become unbalanced.
abiotic factors include decomposers such as fungi and bacteria.
tundras have a high diversity of species.

Let's look at all the statements:Which of the following statements is true? Parts of an ecosystem only include biotic factors such as plants and animals. - this is not true, it also includes abiotic factors, such as stones If a common plant in an ecosystem becomes diseased, the ecosystem may become unbalanced. - this is the true statement! it could be a source of food for other animals, and thus it could influence the population of other species Abiotic factors include decomposers such as fungi and bacteria. - this is false, those are biotic factors. Tundras have a high diversity of species. - this is not true - compared to the rain forest, for example, tundras are not very diverse

Bi believe is the answer