What is the largest level of biological organization in the given hierarchy?

The largest level of biological organization in the given hierarchy is organisms. Organisms represent individual living entities that can carry out all basic life processes. They are composed of multiple levels of organization, including cells, tissues, organs, and organ systems, which all work together in a cohesive manner to maintain life. While cells are the basic units of life, tissues are groups of similar cells working together, and atoms are the fundamental building blocks of matter, none of these represent the complete and complex functioning individual that an organism embodies. Thus, organisms are considered the highest level in this hierarchy, integrating various biological structures and systems to sustain life.