Which statement best describes beaches?
a. beaches change little over time as waves follow the same patterns year after year.

b. beaches change over time as waves move further up the shore.

c. beaches change little over time as wind patterns stay the same.

d. beaches are always changes due to factors such as waves adding and eroding sand.

i dont know

explanation:

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.