Organization of photosynthetic pigment into clusters is:

Explanation

The organization of photosynthetic pigments into clusters is referred to as a 'photosystem.' A photosystem is a complex of pigments and proteins that work together to capture light energy and initiate the process of photosynthesis. There are two main types of photosystems in photosynthetic organisms: Photosystem I (PSI) and Photosystem II (PSII). Options A, C, and D are incorrect as they do not accurately describe the organization of photosynthetic pigments into clusters.