Question

fill in the blank question the name given to media that work by showing live reaction types, such as a color change in some colonies but not in others, is blank media

Explanation:

In chemistry (a subfield of Natural Science), indicators are substances that show a distinct change (like color change) in different media (e.g., acidic vs. basic solutions) to indicate the nature of the medium. The description in the question matches the definition of an indicator.

Answer:

indicator