Which of the following examples poses the greatest potential threat to an ecosystem's biodiversity?

A. Abandoned farmland is allowed to go fallow and begins to fill in with weeds, shrubs, and saplings.

B. A nonnative species of bee is introduced to prey on the introduced species of fire ants in the Southern United States.

C. A monoculture of fir trees is planted on land that was once clear cut from deforestation.

D. The trapping and relocating of wolves poses a threat as they move into areas of high human population.

Answer: Option B

Explanation:

A non native species is greatest threat to biodiversity. The species that are not present in the particular place and are introduced in the biodiversity by any means whether it is intentional or unintentional is known as invasive species or non native species.

The non native species of bees is introduced to prey on the fire ants can be a threat to biodiversity as it can use the resources available for the native species.

The effect of the non native species on the native species is not predictable on the species that is already present there.