Answer:
c
Explanation:
Bc , It's The Right Answer
Answer:
Environment
Explanation:
In a research study, internal validity refers to how well an experiment was carried out and to what extent the piece of evidence supports a claim.
The lesser the chance of confounding in a study the higher the internal validity.
Study of memory is possible through learning the electrical activity created by neurons.
Therefore, thunderstorm will affect the readings hence it is an Environmental threat to the internal validity.
C. Realistic. If your goals are not realistic, then they are un-achievable and you will not make it.
It can be both good and bad. Extreme dieting can make you sick, and you end up being underweight. Minor dieting could be good for you if you're overweight.
