mental struggle arising from opposing demands or impulses.
Conflicts in Literature
Internal conflict is described as person against self.
Definition: The protagonist struggles with opposing forces, emotions, beliefs, and/or values with their self.
Example: When you are in the cafeteria, and you are conflicted as to weather you should get pizza or a sandwich, you are experiencing internal conflict.
Suspense is defined as "Mental uncertainty" and "Pleasant excitement as to a decision or outcome." (www.merriam-webster.com)
So what does this mean?
As the story progresses, excitement can be caused by the options presented to a character and by how he/she makes a decision through their emotions, beliefs, and/or values.