Final answer:
Biotechnology involves the use of biological systems or living organisms to modify products or processes. Humans using yeast to make beer and wine is an example of biotechnology.
Step-by-step explanation:
Biotechnology is the use of biological systems or living organisms to make or modify products or processes for specific use. One example of biotechnology is humans using yeast to make beer and wine, as they employ the microorganism yeast to ferment sugars and produce alcohol. This process utilizes genetic engineering and cell culture techniques to create a desired product for commercial use.