A. geographic range because there is a range of area where a species can thrive but after you reach a certain point the climate and environment changes and species will no longer be able to withstand it. Climate, weather, and sometimes habitat would all be considered abiotic factors.
The correct answers are "sometimes, no change or reduced".
If our sensory systems are exposed to the same exact stimulus repeatedly, sometimes it causes our sensory systems to react and sometimes it has no effect. In some cases, it may have a reduction of sensitivity, but sometimes it has no effect to our sensory systems.
Having a high surface area helps so yes in the human body villi is an example of a structure that increases surface area to increase absorption rates.