One defining characteristic of pure monopoly is that: the monopolist is a price taker. the monopolist uses advertising. the monopolist produces a product with no close substitutes. there is relatively easy entry into the industry, but exit is difficult.

One defining characteristic of pure monopoly is that the monopolist produces a product with no close substitutes. A pure monopoly is a market structure where there is a single company that produces a product and there is not another company that produces a product remotely similar. Due to not having another substitute the company with the product that is the only one available becomes a pure monopoly. 

The correct answer is: Low sales volume.

Explanation:

This is a part of the introduction stage of the product life cycle. Normally, when a product appears in the market, as it is new and unknown, the sales are not high. Even more with innovating and completely new products, when people still don't trust it or simply haven't discovered it. This is where the marketing tools work on actually making a market for it.

If this first stage is successful, then sales and profits start rising rapidly.

Tough competition with competing products is a marketing strategy in the situations when we launch a product that already exists on the market, but we want to emphasize that ours is better or special for some reason.

Vigorous price competition from dying products - If we are talking about dying products, it means that we have already come to the decline stage.