5) What is the contour interval used on this map? 7) is the slop steeper at “M” or “N”?
8) Which hill has higher elevation? Hill A or Hill B?

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.