50 points < 3 i am writing a science fair project research paper and i can't seem to determine what the independent variable, dependent variable, constants, and control is in my hypothesis. picture is added below to what i currently have so you know what i'm trying to ask for. < 3

Independent Variable: Scenarios (such as different times of the day or places) used to check if a person will become depressed or not.

Dependent Variable: Number of people diagnosed with depression.

Constant: Amount of people who do not understand depression.

Control: How your setting can impact mood and performance.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

i think the answer would d