Riding a bicycle to school can improve health and increase fitness. which fact would support the cause-and-effect relationship in the statement?
many cities have bicycling clubs for commuters.
bicycles need to be kept in good repair.
regular bicycling increases the amount of oxygen absorbed by the body.
your neighbor used to ride her bicycle to school.

Regular bicycling increases the amount of oxygen absorbed by the body.

The claim states that riding a bike to school can improve health and increase fitness. However, it does not explain why this is the case. The only fact that expands on the information of the claim is the third one. The third fact explains that riding your bike regularly increases the amount of oxygen your body absorbs. This mechanism provides a cause-and effect relationship that supports the original claim.

umm of course in fact ur getting your answer : )

answer: b (host)

viruses use the cells of living organisms to reproduce. the cell which is used by virus is called as "host cell". it is a living cell in which virus multiplies, example bacteria, plant or an animal cell.

in this, the virus is a parasite, which uses host cell for its benefit (reproduction) by using the cell machinary of host cell.