Answer:
marijuana
Step-by-step explanation:
Marijuana: The term marijuana is also referred to as cannabis and is defined as a psychoactive drug that has been taken out from the cannabis plant and is also being used for recreational or medical purposes.
People who take marijuana to elevate or increase their mood tends to find that this drug is responsible for turning them on which often leads to creating anxiety, severe depression, and paranoia, etc. Marijuana is also responsible for causing long-term effects including increased heart rate, changes in perception, impairs peripheral vision, etc.
In the question above, Rebecca most likely has taken marijuana.