___________Seems to Be Involved in Threat Sensitivity or Anxiety

question 21

Multiple Choice

___________seems to be involved in threat sensitivity or anxiety.

• A) Serotonin
• B) Gamma-aminobutyric acid (GABA)
• C) Norepinephrine
• D) all of the above

---

Definitions:

Variable Costs

Costs that vary directly with the level of production or output, such as raw materials and labor.

Fixed Costs

Costs that do not change with the level of output or sales, such as rent, salaries, and insurance premiums.

Car Washes

Businesses or services dedicated to cleaning vehicles, both internally and externally, often offering various levels of service.

Variable Costs

Charges that fluctuate in accordance with the amount of output.