Interspecific interaction could be

Why do parasites exhibit parasitism?

Which characteristic does mycorrhiza represent?

Choose the correct statements regarding population interactions between two species.
$A$. In both parasitism and commensalism, only one species benefits and the other species is harmed.
$B$. Both species benefit in mutualism.
$C$. Both species benefit in commensalism.
$D$. In parasitism, only one species benefits and the other species is harmed.
$E$. In amensalism, one species is harmed and the other is unaffected.

How do parasites harm the host?

Competition for food,light,and space is most intense in which of the following scenarios?