Please help me, and please no ABSURD answers!

Which structures are common in younger karst topography? select all that apply. a. caves b. spires c. sinkholes d. sharp towers

Which statements explain how lakes form? check all that ! lava flows block a river. streams flow into shallow areas. groundwater feeds into low-lying areas. ice sheets leave depressions that fill with water. movement of earth’s crust creates low areas that fill with water.

Which of the following is not a potential hazard to agriculture in the middle east? a. contaminated water sourcesb. locust swarmsc. desalination programs d. droughts