Which of the following is the lowest level of biological organization with respect to others?

Explanation

Option A is correct since Multicellular organism level is the lowest that consist only one organism.Option B is incorrect because Biosphere is the thin layer of earth where all types of life exist, it is highest level.Option C is incorrect because Specie is very similar , potentially interbreeding organisms it is next to organism level.Option D is incorrect because Population is members of one species inhibiting the same area and it is next to specie level.