Which events are likely to be catastrophic to an ecosystem? Select the three correct answers.
A. Introduction of a species that reproduces quickly
B. Volcanic eruption
C. Average annual snow melt
D. Tornado
E. Change in leaf color in the fall

introduction of a species that reproduces quickly ,volcanic eruption,tornado

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

the correct answer is - ability to find a mate