Question

which factor would most likely cause a population decrease? stable chemical conditions specialized niche ability to avoid predators high birth rate

Explanation:

To determine the factor causing population decrease, analyze each option:

• Stable chemical conditions (e.g., consistent pH, nutrient levels) support survival, so they do not cause a decrease.
• A specialized niche means a species relies on a narrow set of resources/conditions. If those resources become scarce or the environment changes, the species struggles to adapt, reducing population size.
• Ability to avoid predators increases survival, promoting population growth.
• High birth rate directly increases population size.

Thus, a specialized niche is most likely to cause a population decrease.

Answer:

specialized niche