Final answer:
Solar energy is the renewable resource among the options listed, as it relies on sunlight, which is continuously replenished, unlike petroleum, natural gas, and uranium which are nonrenewable.
Step-by-step explanation:
Renewable resources are those that can be replenished by natural processes as quickly as humans use them. Among the options given, solar energy is a renewable resource because it is derived from sunlight, which is constantly being produced by the sun and is in no danger of being used up. On the other hand, petroleum, natural gas, and uranium are nonrenewable resources; they exist in fixed amounts on Earth and are used up faster than they can be replaced by natural processes.