How can we justify the conservation of energy using “system/surroundings” terminology for an open, closed, and isolated system?

Energy can not be created nor destroyed.

Explanation:

Conservation of energy refers to the statement that energy can't be created nor destroyed, it can only be transformed into another form of energy. For example, if a pendulum swing to and fro motion, the kinetic energy is converted into potential energy. A closed system can exchange energy with its surroundings and transform that energy into heat and work. Total energy of an isolated system remains constant because no energy go out from the system.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

linnaeus is the father of taxonomy

explanation:

which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.