Question

what does taxonomy help us understand about living things?
how living things are related to each other
how living things adapt to their environment
all of these
how living things obtain energy

Explanation:

Taxonomy is the science of classifying and naming organisms. Its primary purpose is to show the evolutionary and biological relationships between different living things. Understanding how living things adapt to the environment is more related to ecology and evolutionary adaptation studies, and how they obtain energy is related to topics like metabolism. So taxonomy specifically helps understand relationships between living things.

Answer:

A. How living things are related to each other