The distribution of natural resources depends upon number of physical factors like terrain, climate and altitude. The distribution of resources is unequal because these factors differ so much over the earth.
I believe that elevated serum creatinine levels indicate a kidney disease
Two primary techniques to identify use cases are USER GOAL TECHNIQUE AND EVENT DECOMPOSITION.
Use case refers to an activity which a system perform as a result of the request input by a user.
User goal technique is used to determine the specific goal that must be perform by the system for the user; user goal technique identify all the users of the system and their goals for using the system.
The event decomposition is used to determine the event to which the system must respond.<span />
I think this is ether b. Trait or C. Allele, pretty sure it’s allele though. Good luck!