Biodiversity is defined as the variety of genes, organisms, species, and ecosystems and plays an important role in the long-term sustainability of life on Earth.

The correct answer will be - true (assuming the student is asking the true or false)

Explanation:

Biodiversity refers to the diversity of the biological world. The biological world is composed of the living organisms and their associated concepts.

The biodiversity represents the variety of organisms and species in an ecosystem, variety in the ecosystems and the genes which contribute to the variation in the organisms along with controlling the traits of organisms. The biodiversity is the major factor which has maintained the natural sustainability on Earth.

Thus, true is the correct answer.