Which describes a renewable energy resource is it? It consists of carbon and hydrogen molecules, or is less expensive than fossil fuels, or it is more prone to serious accidents, or it produces less pollutants than fossil fuels.

A renewable energy resource that consists of carbon and hydrogen molecules is not specifically described in the given options.

However, if we consider the options provided:
- Being less expensive than fossil fuels does not necessarily indicate a renewable energy resource.
- Being more prone to serious accidents is not a characteristic usually associated with renewable energy resources.
- Producing fewer pollutants than fossil fuels is a characteristic commonly associated with renewable energy resources.

Therefore, the option that best aligns with a renewable energy resource is: "it produces fewer pollutants than fossil fuels."

The renewable energy resource that produces less pollutants than fossil fuels describes the characteristics of renewable energy resources.

The description that best matches a renewable energy resource among the options you provided is "it produces fewer pollutants than fossil fuels."

To determine this, it is important to understand the characteristics of different energy resources and how they align with the given descriptions. Let's break it down:

1. "Consists of carbon and hydrogen molecules": This description doesn't specifically point to any particular energy resource as both fossil fuels (non-renewable) and renewable energy sources like biomass and renewable hydrogen can consist of carbon and hydrogen molecules.

2. "Less expensive than fossil fuels": This description doesn't definitively identify a renewable energy resource. The cost of various energy resources can vary depending on multiple factors such as technology, availability, and location.

3. "More prone to serious accidents": This description doesn't directly relate to renewable energy resources. Instead, it is often associated with non-renewable energy sources like nuclear power or fossil fuel extraction, transportation, and storage.

4. "Produces fewer pollutants than fossil fuels": This description aligns with renewable energy resources. Unlike fossil fuels, which release pollutants when burned, many renewable energy sources such as solar, wind, hydro, and geothermal power generate electricity without producing air pollutants.

In conclusion, based on the provided options, the renewable energy resource that matches the description is one that produces fewer pollutants than fossil fuels.