25 POINTS HELP (6th grade question)

Which landform change due to destructive processes is most easily controlled by human intervention?

A) coastal erosion

B) erosion by glaciers

C) volcanic deposition of lava

D) surface movement in earthquakes

A)  

coastal erosion

Explanation:

Coastal erosion is easily stopped by planting dune grass and other plants, or installing beach fencing or a sea wall. Hope this helped i did it on usatstprep

a is the correct answer

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.