Discuss what trophic level humans occupy on an ecological pyramid, and explain what happens to contaminants and environmental pollution( such as mercury) as you move down and up the ecological pyramid

According to a source, the most probable answer to this query is that tropic level is also observed among humans. Noting that humans are heterotrophs and omnivorous, they relay on other organisms  food. Hence they are ether primary or secondary consumers. 

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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.