You could argue humans (we are technically and possibly philosophically animals).
They Leave Behind Bones or leaves from whatever they were.
because after the flood the water would leave behind furtile soil, and rich land
Animal resin is the residue that is left after an animal leaves. Snails for example leave behind a type of resin.
Anne Frank had to leave behind her pet cat named Moortje before going into hiding from the Germans. She mentioned her in her diary and missed her during her time in hiding.
High tides flood the salt pans with sea water which evaporates to leave behind salt deposits. This is how salt deposits are formed.
The minerals in the water are left when the flood waters recede, along with the minerals brought to the surface of the soil making it more fertile.
leave a trace of yourself behind
A flood may cause damage to the house's interior, destroy furniture, and leave behind a stinking, muddy mess (possibly contaminated with sewerage). In extreme cases, it could even undermine the house's foundations, making the house unsafe. If such a flood has happened before, house insurance may be impossible to get, or very expensive.
A slug? A politician?
in india what does the water leave behind
NO, because it's so dry, the flooding, would flood fields and crops and leave behind fertile soil called silt , which was great for farming!
Dam, Jetty, Leave