Option 1, coal, is not a renewable resource. Coal is a fossil fuel that takes millions of years to form and cannot be replenished within a human lifespan.

Option 2, mineral oil, is also not a renewable resource. It is derived from fossil fuels and is limited in supply.

Option 3, natural gas, is not a renewable resource either. It is formed from the remains of ancient plants and animals, but the process takes millions of years.

Option 4, forests, is the correct answer. Forests are considered renewable resources because they can regrow and replenish themselves over time. Trees can be harvested for wood and other materials, and new trees can be planted to replace the ones that were cut down. This allows for a sustainable cycle of resource use.