The sentence that is part of the evidence in this paragraph is Sentence 3: The National Zoo in Washington D. C. has bred Sumatran tigers, boosting a population that was once only seven hundred in the world.
A paragraph is a unit of writing that consists of a group of related sentences focused on a single topic or idea. It is a way to organize and present information in a coherent and logical manner. A paragraph typically begins with a topic sentence that introduces the main idea or point of the paragraph.
This sentence provides specific evidence of the National Zoo's efforts in breeding Sumatran tigers and contributing to the increase in their population.
A well-structured paragraph helps to convey information effectively and allows readers to follow the flow of ideas.