He got it right i just took that test
The answers are in their respective places
E.G :
A => answer below it
B => answer below it
C => answer below it
Answer:
In the given question, the crucial rivets represent keystone species.
Explanation:
An ecosystem comprises some of the species, which are essential to the survival of the other species in the system, these species are known as the keystone species. The keystone species can be an unassuming plant or a huge predator, and in the absence of a keystone species, the ecosystem may not thrive.
In an ecosystem, the keystone is regarded as one of the most essential parts. A keystone species refers to an organism, which helps in sustaining the system together. Some of the ecosystems may lose their tendency to amend with the changes in the environment if their keystone species get vanished.
There are three kinds of keystone species considered by various scientists. These are ecosystem engineers, predators, and mutualists.
The correct answer is B. An atom has four protons. Hope this helped. Have an awesome day! :)
Answer:
from deepest to shallowest, the inner core, the outer core, the mantle and the crust.
Explanation: