Answer:. d
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Explanation:
How are you?
Answer:
The built environment can have a significant impact on human health because it can influence people’s levels of physical activity; the safety of travel; the quality of outdoor air; access to jobs and services; and opportunities for social interaction and recreation.
Explanation:
Well, I'm not sure about how many cells we have, but the average human body makes about 259 billion red blood cells per day. (That's why I don't know). Also, there are about 200 different types of cells with about 20 different types of organelles.
Hope this helps!