GIVING BRAINLIEST!!!

Two environmental changes are described below:

Environmental change 1: Many small tree saplings are competing for sunlight on the forest floor.
Environmental change 2: Many bluebirds have become ill with the infectious West Nile virus.

Which statement is true about these environmental changes?

A) Environment change 1 is increased predators and environmental change 2 is climate change.
B) Environment change 1 is pollution and environmental change 2 is disease.
C) Environmental change 1 is reduced space and environmental change 2 is disease.
D) Environmental change 1 is reduced space and environmental change 2 is lack of food.