All food chains begin with the energy produced by the sun. From there they move in a straight line as the energy is moved from one living thing to the next. Here's an example of a very simple food ...

Most food chains start with a green plant, because plants make their own food by photosynthesis. A consumer is a living thing that eats other plants and animals. Food chain basics: ...

A food chain also shows the flow of energy, which starts off at the Sun and then moves along the chain to the final animal. ... Most food chains start with a green plant.

A food chain always starts with a producer. This is an organism that makes its own food. Most food chains start with a green plant, because plants can make their food by photosynthesis.

When you start looking at casual dining—another industry category into which Yelp sorted local spots—you can see another group of cities with low chain ownership: the (relatively) old ones.