(1) Tigers are the largest wild cats in the world. (2) They are easily recognizable by their reddish-orange coat with dark stripes. (3) A tiger can weigh over 700 pounds, and be six feet long with a three-foot long tail. (4) Their natural habitat is the eastern and southern portions of Asia. (5) Tigers live in areas with dense vegetation. (6) They live in areas that are close to water and have an abundance of prey such as antelope and deer. (7) They kill their prey. (8) They kill them by taking down their prey with their retractable claws, strong body, and powerful jaws. (9) Tigers are strong swimmers. (10) Tigers enjoy bathing in water. (11) They enjoy cooling in ponds, rivers, and lakes. (12) Tigers communicate with each other. (13) Tigers talk to each other by roaring, moaning, hissing, growling, and chuffing. (14) I love to hear a tiger roar. (15) Each sound has a different meaning and conveys whether the tiger is feeling content, mad, or threatened.

Which two sentences should be combined to improve the passage?