Question

most plastic bags are made of polyethylene. polyethylene is a kind of polymer, a substance made of hundreds of repeating units called monomers. the prefix poly- in polyethylene means many. so polyethylene is made of many units of ethylene. which model shows polyethylene?

Explanation:

Step1: Recall polymer structure

A polymer like polyethylene is made of repeating units.

Step2: Analyze models

The first model shows a long - chain structure with repeating units which is characteristic of a polymer. The second model is a single ethylene molecule (a monomer).

Answer:

The first model (the long - chain structure)