<span>keeping their stomata open just enough to allow photosynthesis to take place but not so much that they lose an excessive amount of water. Leaves take in carbon dioxide and give off oxygen during photosynthesis.</span>
Answer:
d. They are often keystone species
Explanation:
Top predators in an environment are the largest predators and sits on the top (apex) of the food chain in an ecosystem which do not have any natural predators.
As the top predators relative to its abundance has disproportionately large effect on its natural environment, they are the keystone species most of the time.
Hence option d. They are often keystone species is the right option.
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