What is meant by organization within living things?

The concept of organization within living things specifically refers to how living organisms are structured at various levels of complexity. This includes being composed of cells, which are the fundamental units of life. Cells group together to form tissues, which then combine to create organs. These organs work together to form systems that enable the organism to function as a whole. This hierarchical organization is crucial for the coordination of biological processes and allows organisms to maintain homeostasis, respond to stimuli, grow, reproduce, and carry out other essential functions.

While the other options touch on aspects of biological organization or the relationships among organisms and their environments, they do not accurately capture the specific meaning of internal organization within living organisms. The focus on cells, tissues, and organs highlights the intricate levels of structure that enable life, making option B the most appropriate choice.