It is a true statement that Southeast Asia is located on the equator, which means almost the entire region falls within the humid tropics. The correct option the two options that are given in the question is the first option or option "a". Equator is actually an imaginary line on the surface of the earth that is at equidistant from the north pole and the south pole.
Overfishing at sea can lead to an extinction.
Overfishing is a serious problem, it affects lot of marine species, at every water corner of the Earth. If the fishing is not controlled strictly it leads to extinction of the marine wildlife, lot of species have already been extinct, thousands are on the verge of extinction. Also, the extinction of a single species makes big problem in the ecosystem, removing lots of species has huge impact on lots of ecosystems that are connected and the consequences are irreparable.
Answer: Actually, the submarine was built in Groton, Connecticut and was launched in the Thames River