If plants require energy for survival, then what requires energy for survival? Answer choices: - gravity - plants - animals - density - Lobsters - Joules - Clams - humans
plants

If ecotourism increases the stability of ecosystems, then what increases the stability of ecosystems? Answer choices: - overpopulation - water consumption - loose soil - Quality of life - agriculture - deforestation - ecotourism - trees
ecotourism

If killing bacteria in food can be used to extend the shelf life of that food, then bacteria can be killed to extend the shelf life of what? Answer choices: - milk - rocks - coffee - edible - food - phytoplankton - influenza - tuna
food