Clouds form when air is? A)swirled by wind
B)heated by the sun
C)turned into ozone
D)transpired by plants

If you were a casual recreational hiker with young children, which of the following trails would be least strenuous for a leisurely family outing? a. merced lake trail b. mirror lake loop trail. c. tenaya lake and tuolumne meadows trail d. el capitan trail