Which processes would cause an animal cell to burst if it were placed in distilled water

According to the loco mass the mass of reactants and products

Idont understand by supporting the plant and holding the leaves up to the light. question 3 options: tap or fibrous root flower petals herbaceous or wood stems leaves with stomata

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?