Answer:
Floods, product failure, change in demand, and ineffective sales are all examples of risks.
Step-by-step explanation:
Risks are situations or events that can cause a negative effect. There are different types of risks and they can be reduced with different strategies but it's hard to avoid them completely. So, things like floods, product failure, change in demand and ineffective sales are situations that have a negative impact in a company and because of that the answer is risks.
The other options are not correct because costs refer to expenses related to the operation of a business, rewards are incentives you receive for doing something and revenue refers to income generated.