Which of the following statements about erosion is true?
a. erosion occurs as a result of drastic changes in temperature.
b. erosion occurs when wind or water moves over sediment, soil, or rocks.
c. physical and chemical are the two types of erosion.
d. movement is not required for erosion to take place.

In a 2010 article “fact check: eastern u. s. earthquake risk” by chris mould, the author provides as evidence the following statement by the united states geological survey: “although earthquakes may be less frequent in the eastern u. s., … urban areas in the east could face bigger losses because the shaking would affect much larger areas than similar quakes in the west. in addition, most homes and buildings in the east are not designed to withstand earthquakes.”this statement directly relates to which of the following concepts? a. vulnerabilityb. hazardc. riskd. severity

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

What could the united states of america do to improve their status? name at least 3(ap human geography)