A person travelled 350 m east from his home and returns back home an hour has displacement of_?​

vector of zero magnitude

Explanation:

The displacement is a vector magnitude, therefore, in addition to being a module, it has direction and sense.

In this case it moved 350 m and then returned the same 350 m, so the total displacement is zero.

If we draw the vector, one has a directional direction to the right and the other direction to the left, therefore when adding the two vectors gives a vector of zero magnitude

answer; (d) spontaneous processes are characterized by the overall conversion of order to disorder;

mistakes are ok