Answer:
A) They would decrease
Explanation:
Chironomid is a family of minute long-legged nematocerous two-winged flies that is now usually restricted to forms without piercing mouthparts. The insect family comprises the non-biting midge and related forms. Chironomid larvaes weave the algae into retreats, or "tufts.
If steelhead were removed from the web, the numbers of tuft-weaving chironomids would decrease.
