If there are three test tubes: Test Tube A contains a snail…

If there are three test tubes: Test Tube A contains a snail submerged in water, Test Tube B contains an aquatic plant submerged in water, and Test Tube C contains a snail and an aquatic plant submerged in water. If Test Tube C has both an aquatic plant submerged in water and a snail submerged in water, and there is plenty of supplied sunlight, what process or processes will be occurring in Test Tube C as time progresses?