Which level of organization is the highest?

Biosphere

Explanation:

The biosphere is the highest level of organization. The biosphere not only involves living things but also relationships and interactions between them.

The basic unit of living beings is cell which forms tissue. The tissues are involved in the formation of organs which further develops a organ system in an organism. Thus forming an organism, then populations. The various number of populations forms communities which further form ecosystem and then the highest level of organization that is biosphere.

answer; the correct answer is desert plants;

the answer is d. chordata