Question

rust fungi live on plants and feed on them to obtain nutrients. they reproduce on plants and live their entire lives on them, potentially causing disease in their host plant. this is an example of:
a commensalism
b mutualism
c predator-prey
d parasitism

Answer 1

The interaction you described, where rust fungi live on plants, feed on them, and potentially cause disease in their host plant, is an example of **d) parasitism**. In parasitism, one organism benefits (the parasite) at the expense of the other (the host), which is harmed in the process.