Meaning: This sentence describes the pleasant smell of fresh herbs in the kitchen.
Choice of Words: The adjective "fresh" describes the condition of the herbs, and "scented" means that the herbs filled the air with their fragrance.
Meaning: This means that the good smells from the fresh herbs were moving gently through the kitchen.
Choice of Words: Aromas are pleasant smells. Wafted means to move gently through the air. Through means from one side to the other of something.
Meaning: This means that the kitchen was full of the good smell from the fresh herbs.
Choice of Words: Fragrance is a pleasant smell. Filled means to make something full of something else.