A$($n$)\_\_\_\_\_\_\_\_$ is a favorable set of circumstances that creates the need for a new product, service, or business while a$($n$)\_\_\_\_\_\_\_\_$ is a thought, an impression or a notion.

A$($n$)\_\_\_\_\_\_\_\_$ is a favorable set of circumstances that creates the need for a new product, service, or business while a$($n$)\_\_\_\_\_\_\_\_$ is a thought, an impression or a notion.

notion, scheme

opportunity, idea

idea, design

idea, opportunity

scheme, spark