1) The 2 (second) paragraph describes the life and habitat of the orca. The 3 (third) paragraph describes a problem.
2) Yes, they hunt and play in groups.
3) The orcas eat fish, squid, seals and turtles.
4) Females have one calf every two or three years.
5) Thee are becoming extinct because of the pollution in the sea and they also die in fishing nets.