Answer: I would say option 2. Sharp teeth
Explanation:
Due to carnivores eating primarily meat, their teeth need to be sharp to cut, tear, and rip the skin/meat on their prey. (Hope this helped :D )
A cause was that Texas declared its independence from Mexico. It changed the U.S. by the U.S. gaining California, New Mexico, Utah, Arizona, Colorado and parts of Wyoming.
Answer:
Economic, political, and social issues merge with circumstances of modernization to make people want to migrate from rural to urban areas.
Explanation:
