Answer:
the best one is to wash your hands. you can also not touch your face as much. this will help stop the spread of germs.
Answer:
The last one and the first one.
hope I could help you pls give this answer a hart thx
Explanation:
A sample is a random, unbiased selection out of a larger group. An independent variable is one that is changed as to see how it will affect the dependent variable in an experiment.
Hope that helped.
A.) Oxygen is an output......