Question

a simple trophic pyramid from the coastal pacific ocean shows a kelp forest that is eaten by sea urchins, which are eaten by sea otters. if a killer whale ate all the sea otters, what would happen to the ecosystem? the urchins would decrease and the kelp would increase. the urchins and kelp would both increase all the species would die the urchins would increase and kelp would decrease

Explanation:

In this ecosystem, sea otters eat sea urchins. If sea otters are removed (killed by killer whales), there is no predator to control the sea urchin population. So, sea urchin numbers will increase. Since sea urchins eat kelp, more sea urchins will lead to more kelp being consumed, causing kelp population to decrease.

Answer:

the urchins would increase and kelp would decrease