soil is better
Where the plant can get sun and water.
water is best for plants. Soda has chemicals that will harm or kill the plant
rain water
Most plants grow best if they are in an area where they can receive plenty of sunlight and water.
Fresh water does actually help plants grow! (Um... heard of rain?) In fact, fresh water is the best water for plants to help them grow. Salt water can be a bit to extreme for plants, and can cause them to wilt. Salt water is great for sea plants, like sea weed or coral reef, but most plants grow better around fresh water.
Tap water, salt water will kill them
I think it depends on what plants you are talking about because some rice plants grow best in flooded land but a lot of plants will die with out soil.
Animals. The part that we think of as "sponge" is their skeleton.
Pond plants like water lillies and flag irises ,watercress is also fine.
Water helps plants grow
water is the best liquid to give your plant because it is natural to plants to grow in because if u give a plant dr. pepper the plant must adapt to the soda in order for it to grow!
cooking oil and water.