1. Manipulation of Biological Systems: Fermentation utilizes living organisms, typically microorganisms like bacteria or yeast, to carry out specific chemical transformations. This involves harnessing and directing the metabolic pathways of these organisms for desired outcomes.

2. Production of Valuable Products: The process results in the production of various valuable products, including:

* Food and Beverages: Bread, yogurt, cheese, wine, beer, and many other food products rely heavily on fermentation.

* Biofuels: Ethanol, a biofuel, is produced by fermenting plant materials like corn or sugarcane.

* Pharmaceuticals: Antibiotics, vitamins, and other pharmaceuticals are often produced through fermentation processes.

* Industrial Chemicals: Fermentation can be used to create solvents, acids, and other industrial chemicals.

3. Controlled Environments: Fermentation takes place in controlled environments, often in large-scale bioreactors. This allows for optimization of conditions like temperature, pH, and nutrient availability to enhance the efficiency and yield of the desired products.

4. Technological Advancements: The field of biotechnology has advanced significantly, leading to improvements in fermentation techniques, such as:

* Strain Engineering: Genetic modification of microorganisms to enhance their efficiency and productivity.

* Process Optimization: Utilizing computer models and other tools to fine-tune fermentation conditions for maximum product yield and quality.

* Novel Applications: Expanding the application of fermentation to new areas like the production of bioplastics and sustainable chemicals.

In summary: Fermentation is considered biotechnology because it involves the manipulation of biological systems for the production of valuable products in controlled environments, relying on technological advancements for improved efficiency and expanded applications.