Answer:
Tropical- rain forests are considered to be the lungs of the Earth due to their role in the carbon-oxygen cycle. The rain forests take in carbon dioxide and release oxygen into the Earth hence, providing the Earth with an abundance of oxygen. The working of these tropical rain forests is just like the working of our lungs, lungs remove carbon dioxide from the body and supply oxygen. Tropical rain forests carbon dioxide for the Earth and supplies it with oxygen.
A Dialog Controller<span> (DC) is an element that composes the Language Comprehension module and provide a way of establishing a </span>dialog<span> between two agents. A DC can be prepared to answer questions or start a new conversation spontaneously. For instance, the internal state of a given agent can be monitored.</span>
D
Explanation:
With the help T cells , B cells make special proteins called antibodies which stick to antigens on surface of germs stopping them in their track.
