Question

how is plastic cover is made.​

Answer 1

Explanation:

This thermoforming technique begins with extruded or rolled plastic sheets of the desired thickness that are fed into a pre-heating machine. ... While in place the plastic is cooled until it reaches the desired rigidity. The final cover is ejected with reverse air flow before being trimmed or otherwise finished.

Answer 2

Answer:

The increase in concentration of harmful chemical substances like pesticides in the body of living organisms at each trophic level of a food chain is called biological magnification.