Red mangrove trees have roots that prevent soil erosion in coastal areas. they also provide hiding places for the young of coral reef fish. the trees, however, don’t receive any kind of benefit from the coral fish. what kind of symbiotic relationship exists between the trees and the coral fish?

Yes, commensal is correct because I took the test.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.