which of the following statements best describes the biosphere?

a) it is a mixture of gases that contain dust particles
b)it contains earths metal core
c) it contains all of earths water
d) it it the part of earth that contains living organisms

is it d ?

Yes, the correct answer is d) it is the part of Earth that contains living organisms. The biosphere refers to the regions of the Earth that support and sustain life. It includes all living organisms, such as plants, animals, and microorganisms, as well as the environments they inhabit, including the land, water bodies, and the atmosphere. To determine the correct answer, you can eliminate options a), b), and c) because they do not accurately describe the biosphere. Option d) is the only statement that accurately represents the biosphere as the part of Earth that contains living organisms.