Which of these is a part of good dental hygiene?
a. washing fruit and vegetables
b. frequent handwashing
c. regular physical activity
d. yearly dental visits

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.