Which of the following is the BEST description of an ecological niche:

W) a situation in which a species is well adapted to a specific set of environmental conditions

X) the biomass load of a given environment

Y) a pollutant that becomes concentrated in organisms as it moves up through the food chain

Z) all the environmental conditions, plants, and animals of an isolated area
W) A SITUATION IN WHICH A SPECIES IS WELL ADAPTED TO A SPECIFIC SET OF ENVIRONMENTAL CONDITIONS