Ontario Grade 9 Science Class Practice Exam 2026 – Your Complete Guide to Exam Success!

Photosynthesis is the process by which plants and some other organisms use energy from sunlight to convert water and carbon dioxide into oxygen and sugars. Respiration is the process of converting oxygen and sugars into energy. Fermentation is a process that occurs in the absence of oxygen, and involves converting sugars into energy. Osmosis is the movement of water molecules across a semipermeable membrane. Therefore, the correct answer is C, as it specifically mentions the conversion of water and carbon dioxide into oxygen and sugars.