Which behavior is an instinct? A.pigeon begins visiting a local park to look for dropped crumbs.

B. A pet dog sits and waits for a treat after its daily walk.

C. A deer gets used to hikers walking by and stops running away.

D. A newborn piglet drinks its mother's milk.

An instinct is: D. A newborn piglet drinks its mother's milk

Well when it snows the road salt definitely can wreck a car but a lot of wonder does it hurt the environment. when they lay down the salt and it snows eventually that snow melts turns into water and evaporates or flows into local water streams. so yes in some cases it can add extra salt to water that doesn't need it.