Answer: B. The first paragraph provides background information for the second paragraph.
The first paragraph of this text talks about the problem of endangered species, and how it is illegal to capture, harm or shoot any animal that is endangered. It also tells us that unfortunately, human activity keeps hurting these species.
All this information is provided as background for the second paragraph, which talks about tigers especifically. The topics of poachers, illegality and population decline are reintroduced, but they are now more specific and clearer stated thanks to the background information of the first paragraph.