Identify the variables in this hypothesis. If a person’s use of cigarettes increases, then the person’s lung function will decrease because the chemicals in cigarettes damage lung tissue and make it difficult to breathe. The independent variable is . The dependent variable is .

independent variable is cigarette use

The dependent variable is lung function

Explanation: the independent variable is the cause and the dependent variable is the effect

Oh and i got it right

answer: a. a gene that causes a specific trait.

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.