Answer:
a. an informative process speech
Explanation:
An expository speech is one that explains the processes involved in doing an activity. It is meant to inform the audience on processes involved in executing a task.
In this scenario strip mining is the process of removing the top layer of soil in order to gain access to a mineral. This process is opposed to digging of deep holes to access minerals. The method is commonly used in coal reserves.
An expository speech by Katerina on strip mining will be an informative process speech on this process of mining minerals
