Synthetic plastics are created through which type of processes?

Synthetic plastics are indeed created through human-controlled chemical processes. This involves the manipulation of chemical reactions and substances to create polymers, which are large molecules composed of repeating structural units. The entire process typically involves the polymerization of monomers – small molecular building blocks – that are chemically bonded together to form long chains or networks indicating that these materials are designed and created through scientific advancements and industrial techniques.

These processes can include techniques such as addition polymerization and condensation polymerization, both of which carefully control the conditions under which the reactions occur to produce specific plastic properties such as flexibility, durability, and resistance to various environmental factors. This engineered aspect of synthetic plastics is fundamental to their function and versatility across many applications.

The other options relate to methods not used for creating synthetic plastics. Natural farming methods and natural fermentation are biological processes largely related to agriculture and the production of organic matter rather than the synthetic creation of polymers. Biodegradation, on the other hand, refers to the breakdown of materials by microorganisms, which is the opposite of the synthetic creation process as it involves the destruction of plastics rather than their manufacture. Thus, the focused approach in synthetic plastic production emphasizes human intervention through chemical control to achieve desired material properties.