Total number of individuals of any species at a place is known as .......
The term population refers to the total number of individuals of the same species occupying a particular geographic area at a given time. All the frogs living in a given pond constitute a population. Organisms of the same kind may form several populations inhabiting different geographical areas. For instance, frogs and water hyacinth plants found in a pond, a marsh, a stream and lake represent different populations of the same organisms.
So, the correct answer is 'Population'.