Answer:
There are many alternative suppliers
Explanation:
Bargaining power of suppliers is one of Porters Five Forces. It refers to the extent to which a supplier can exert influence over buyers.
If there are many suppliers and a supplier raises price, consumer can easily change suppliers. But if the cost of changing suppliers is high (Switching costs), consumers would have less incentive to change suppliers. Thus, the bargaining power of suppliers would be high.
If there are few substitutes, there are few alternatives to the product offered by the supplier. so, the bargaining power of the supplier is high because consumers have little alternatives to the suppliers product.