Final answer:
Enriched media contains added growth factors, e.g., blood, vitamins, yeast extract.
The correct option is 4.
Step-by-step explanation:
Enriched media refers to a type of culture media that contains additional supplements such as blood, vitamins, yeast extract, or other growth factors to support the growth of fastidious organisms or to enhance the growth of a wide variety of microorganisms. These additional components provide essential nutrients and support the growth of bacteria that might not grow well on standard media.
So, the correct option is 4.