Fat storage in humans is an evolutionary adaptation to

The cells in the human body derive the energy required for various bio-chemical processes by using energy rich sources like carbohydrates and fats. Fat molecules stored in human body acts as long term energy reserves. Fat is stored as triglycerides in the adipose tissues present beneath the human skin. About 9 calories of energy is stored in each gram of fat. These fats stored in the cells can be broken down to provide the energy required for cell metabolism. So, we can say the fat storage is an evolutionary adaptation in human beings to survive conditions of food shortage like famine.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

it is either c or d and i know for sure it is not a or b