Answer:
Texas should have been annexed because, it made the union bigger and we would have had more control over the west. if Texas would have still belonged to Mexico we would not have all 50 states, or as much control over the world. we also would have lost a lot more states on the west.
This is the best i could do i hope it works for you i tried to right it like a middle schooler which wasent that hard becuase im a junior please give a thanks