HELP NEEDED ASAP WITH EXPLANATION! I'LL GIVE Answers if you can't see them

a
The event at the end of the Devonian (Dev.) resulted in an increase in the number of Cambrian faunas.
b
The event at the end of the Cretaceous resulted in an increase in the number of Paleozoic faunas.
c
The event at the end of the Triassic (Tri.) resulted in the extinction of fewer faunas than in any other period.
d
The event at the end of the Cretaceous resulted in the extinction of more faunas than in any other period.

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move. 

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. 

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.