A gene mutation can occur because of environmental factors. If a person is exposed to UV lights it can cause a mutation to happen
By he NIH trying a new drug to help reduce pain associated with sickle-cell anemia, it's an example of an "experiment".
An experiment involves a hypothesis (an educated guess as to what's going to happen) and trying out the hypothesis and finding the solution.
B. recreational activity's such as walking, throwing, or riding a bike to school
Answer:
Being active regularly, offers a range of health benefits: Increases flexibility and movement and improves joint mobility. Improves co-ordination, movement and balance – helps to reduce the risk of falls and injury.
Explanation:
Hope this help
C. the city you were born in you social security number
