How could the movement of sediments cause a problem if someone builds on delta marsh, green hill and seaside cliff? answer for delta marsh, green hill and seaside cliff.

Building on unstable ground will cause your structure to sink or to settle somewhat causing structural damage.

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.