Answer:
Shrimp
Explanation:
A producer produces it's own food.
A consumer consumes other organisms for food/energy.
In the food web, we can spot our primary producer: algae.
There are only 3 arrows (ways) that algae is consumed: by the snail, by the shrimp, and by the mussel.
We see that shrimp consumes both algae AND snail, which are producers and consumers, respectively.
Therefore, our answer is shrimp.
