Based on the description of events, being that the lizard population appears to increase as soon as the snake population decreases, it appears that the snakes prey on the lizards. This suggests that the snake is a keystone species. A keystone species is one that has a dramatic effect on maintaining the balance of an ecosystem. As soon as the snake population decreases, major changes occur to the ecosystem, such as the lizard population increasing.
Therefore, the answer is D: <span>The snake is a keystone species in the ecosystem.</span>
Oceanography, geology, meteorology, astronomy, and environmental science
Energy is lost at each Trophic level of a food chain. The more levels then the more energy lost to those at the top.
C. Flood protection is the answer
