A what in biodiversity contributes to the sustainability of an ecosystem

The greater the biodiversity of an ecosystem, the greater the variety of genes and species in that ecosystem. The presence of a diverse set of genes and species indicates that the ecosystem is better able to carry out natural processes in the face of external stress. As a result, the ecosystem is more sustainable.

Explanation:

on the planet jupiter, the acceleration due to gravity is approximately 26 m s2 , roughly 2.7 times the acceleration due

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.