Predator-prey relationships are shown through food trees. food chains. food webs. food networks.

The correct option is SHOW A NETWORK OF FOOD CHAINS.

Scientists used food web models to show the networks of living organisms that are involved in a food chain.

Food chains models are used to represent real ecosystems, with these models, scientists can measure and test for generalized patterns in real food chains.

Explanation:

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.