In an experiment, a thin sheet of material A, B, or C was used to divide two objects of different temperature. In each trial, the conditions were
identical except for the material of the thin sheet. The data table shows the times in which the objects reached thermal equilibrium.
Which material, if any, is the best thermal insulator?

material B

material A

All three are equal insulators.
material

Material c

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

20hope i helep

Decrease the surface area of the object and also decrease the concentration which will allow the particles to collide faster

Idon't  know if i got it wrong but i picked ( a )