Question

how do the fungi benefit by attaching to tree roots?
(a) the roots protect the fungi from insects.
(b) the roots connect the fungi to other organisms.
(c) the roots help the fungi move through soil.
(d) the roots supply the fungi with food.

Explanation:

In mycorrhizal associations (fungi - tree root interactions), trees (via roots) produce organic compounds (food like sugars) through photosynthesis. Fungi, being heterotrophic, get this food from the roots. Option a: Roots don't primarily protect fungi from insects. Option b: Roots don't act as a connection to other organisms for fungi in this benefit - focused context. Option c: Fungi don't move through soil with root help; they have their own hyphal growth.

Answer:

d. The roots supply the fungi with food.