Final answer:
Nuclear fuels and fossil fuels are nonrenewable energy sources.
Step-by-step explanation:
The nonrenewable energy sources among the options provided are II. Nuclear fuels and III. Fossil fuels.
Nuclear fuels, such as uranium, are considered nonrenewable because they cannot be replenished within a human timescale. Fossil fuels, such as oil, natural gas, and coal, are also nonrenewable resources that take millions of years to form and are being used up faster than they can be replaced.