Question

which of the following statements best explains why introduced species often threaten native species in an ecosystem? a introduced species often have less genetic diversity than native species. b introduced species often lack natural predators in their new environment. c introduced species often form mutualistic relationships with native species. d introduced species often cause short - term droughts in their new environment.

Explanation:

Introduced species can thrive and out - compete native species when they lack natural predators in their new environment, which can lead to a decline in native species populations. Genetic diversity (A) isn't the main threat factor here. Mutualistic relationships (C) are beneficial and not threatening. Introduced species don't typically cause short - term droughts (D).

Answer:

B. Introduced species often lack natural predators in their new environment.