During ecological succession, how does the growth of young hardwoods affect the organisms living
in an ecosystem?

A Grasses and low shrubs are
unable to obtain the amount of light they need to
survive, so there are small numbers of them.
B The trees provide shelter and food for a variety of mammals, insects, and
birds.
C In autumn, falling leaves provide a source of energy for decomposers such as
fungi.
D. All of the above