What are the answer choices ?
Answer:
Explanation:
tabaquismo;
contaminación del aire en espacios cerrados;
contaminación exterior;
alérgenos;
exposición a riesgos ocupacionales como el polvo y productos químicos.
Answer: Aqueducts
Explanation: They were first developed around 312 B.C., these engineering marvels used gravity to transport water along with the stone, lead and concrete pipelines and into city centers. Aqueducts liberated Roman cities from reliance on nearby water supplies and proved priceless in promoting public health and sanitation.
I would say B. child care. As you have to provide them with food,water, clothing, etc. Hope this helps!