Answer:
D.
Explanation:
The respiratory system is responsible for breathing—that includes oxygen.
Answer:
De Facto Method of Census: Under this method, the Census Commission fixes one date for conducting the census throughout the country. ...
De Jure Method of Census: Under this method, the enumeration period of two or three weeks is fixed.
Explanation:
A dehumidifier. They work similar to an air conditioner. Warm moist air goes in, is cooled and dried, then exits back into the air.