Answer:
Weak or Indirect.
Step-by-step explanation:
This intells that marketing a plastic product could be hard and of low advantages. Dealing with the fact that its degradation does not come off easily like wood and paper.
The existence of substitute product offers customers different choices and allows them options within the industry and beyond it to products that may fulfill a similar need. In more generic products, there are often more than one ways to address a particular need.