Birds such as blue-gray gnatcatchers nest in the canopy of oak trees. They receive shelter from oak trees, while the trees goes unharmed. Thus, these populations have a commensal relationship. How would the sudden decrease in the size of the blue-gray gnatcatcher population affect the size of the oak tree population? A. The oak tree population would increase. B. The oak tree population would decrease. C. The oak tree population would go extinct. D. The oak tree population would stay the same.

D. The oak tree population would stay the same.

Explanation:

Commensalism is a type of symbiotic association in which one organism gets benefit and the other is unharm. There is a commensalism relationship between blue-gray gnatcatchers and oak tree. Blue-gray gnatcatchers get benefit while oak tree get neither benefit nor harm. So if the population of blue-gray gnatcatchers decreases, there is no effect on oak tree.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added