Question

A group of individuals of same species living at one place constitute a
A. Niche
B. Population
C. Habitat
D. None of the above

Answer 1

Hint: The ecological levels consist of categories like individual, population, species, community and ecosystem. An individual can be defined as only one organism of a population.

Complete answer:
Population is the group of similar individuals in a well-defined group.
geographical area and share or compete for the resources. The different populations of the same organism present in particular areas are called local population or demes. A population is the group of closely related organisms that can interbreed among themselves and can produce fertile offspring.
For the survival of the species in a particular area, it has to acquire the specific resources and physical conditions. These requirements are termed as an ecological niche.
The ecological niche of an organism represents the resources it utilizes the range of conditions that it can tolerate and its functional role in the ecological system.
For the plant ecological niche includes the temperature that can be tolerated, the intensity of light required for photosynthesis, specific humidity regimes and quantities of essential nutrients.
Habitat is the natural environment of an organism, where an organism finds food, shelter, protection and the mates for reproduction. Habitat is characterized with both the physical and biological characters. The physical factors are soil, temperature, light and moisture, whereas biotic factors include food and predators.

So, the correct answer is option B, population.

Note: The ecotype is a local population that is adapted genetically to its environment. The desired traits by natural selection can be evolved at the population level.