Answer: B. Organisms of the same species living in an area.
Step-by-step explanation:
A population can be define as a group of the members that belongs to the same species. These members exhibit similarity genetically, morphological and physiologically. These members are capable of interbreeding among themselves and are capable of producing viable fertile offsprings.
On the basis of the above explanation, B. Organisms of the same species living in an area. is the correct option.