Slugs can be found on land and in the water, both freshwater and the sea. They are very similar to snails but slugs don't have a shell, and in fact any land mollusc without a shell can be called a slug. Since they have nowhere to hide inside and can dry out, slugs usually live in moist or wet places.
A slum is a place where very poor people live. Slums are usually filled with rubbish and have a very large number of people living in them.
You smack someone when you hit them with your open hand. The cat in the picture is smacking the other cat.
A smack is also a small amount of something, for example "this jelly smacks of garlic".
A similar word to smack is slap, trace, hint or suggestion.
Smart is another word for intelligent. A smart person learns quickly and can do or build complex things.





















