How might rapids, waterfalls, and marshes affect the way people can use the region's rivers

The prevailing climatic type in the southeastern part of the usa, western europe, southern brazil and northen argentina is the mid-latitude or: a)humid temperate b)humid cold c)semiarid moderate dry d)summer savanna.

Which of the following expressions is equivalent to -1/4y - 2 1/4 + 1/2 (4-2y)? a. -3y + 2b. -3 1/2+4c. -4 1/2y+2d. -4 1/2y+2show ur work

Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand