Answer:
C. Prevents sir pollution
Explanation:
Because when cars a running they produce fumes which pollute our air. Also that is a car electric charger
Answer:
A theory
Explanation:
A theory is an idea used to account for a situation or justify a course of action.
Dark Energy explains:
How groups of objects function together, and also to keep the universe expanding
Hope this helped.
Two examples of radioisotopes that can be used are carbon-14 to determine the age of fossils. Second, we can use iodine-131 to treat thyroid disease.