Answer:
chlorophyll and accessory pigments allow algae to harvest and use the energy from sunlight
The correct option is C.
The second law of thermodynamics states that the total entropy of an isolated system cannot decrease over time. Entropy refers to the degree of randomness in a system. There are two types of system, open and close system.
Living organisms are examples of open system; this is because they exchange matter and energy with their environments. As living organisms grow up and develop, the degree of entropy in their systems decrease, but this is balanced up by an increase in the entropy of their surrounding environments. For instance, when a man is running, he is using up chemical energy he obtained from the food he eats. The chemical energy is converted into heat energy, which warms his body. The remaining heat energy gets dissipated into the environment and this increase the amount of entropy in the environment.
B. Ecosystem. By definition, an ecosystem is composed of both its abiotic and biotic factors. A community is the population of living organisms in an ecosystem, and a habitat is the generally abiotic location in which the community lives, so "ecosystem" can also be thought of as the inclusion of a community and habitat together. "Pure culture" would more closely describe a population that you might grow on a Petri dish, for instance.