Ontario Grade 9 Science Class Practice Exam 2025 – Your Complete Guide to Exam Success!

Renewable energy refers to energy that is derived from natural resources that are replenished naturally over time. This includes sources such as sunlight, wind, rain, tides, waves, and geothermal heat. These resources are sustainable because they are naturally renewed, meaning they are not depleted when used, unlike non-renewable energy sources such as fossil fuels, which take millions of years to form and can be exhausted.

The importance of renewable energy lies in its reduced environmental impact and its potential to provide a sustainable energy supply without contributing to the depletion of natural resources. This distinguishes it from energy that is limited and non-replenishable, which does not align with the concept of sustainability that characterizes renewable energy.

In contrast to this, the other provided options misrepresent renewable energy. For instance, energy that is generated solely from fossil fuels does not qualify as renewable, as these resources are finite. Furthermore, the concept of energy that cannot be harnessed by humans is also incompatible with renewable energy, which is precisely about using harnessable and sustainable sources. Therefore, option B correctly captures the essence of renewable energy.