Respuesta :
Insects are often harmful to farm crops is expressing a statement of fact.
The correct option is C.
What is indicative mood?
Indicative mood is a verb that makes a statement or ask a question.
It expresses facts in the form of assertions, opinions, or questions.
Example: You opened the gate.
It is also known as realis mood.
Thus, the correct option is C, It expresses a statement of fact.
Learn more bout indicative mood, here:
https://brainly.com/question/2143005