Which phrase best describes the mass movement of particles? sediment flowing down a slope sediment collecting on an existing surface transporting materials to a new location breaking materials into smaller particles

Mass movement of particles is the sediment flowing down a slope.

Explanation:

Mass movement is the process in which sand, soil, rock or other particles under the influence of gravity move in the downward direction.

Therefore, mass movement of particles is the sediment flowing down a slope.

When these particles reach downward slope they are collected by some transporting agent and are shifted to other place.  

a.sediment flowing down a slope

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

the answer is b & c i believe : )