'Inspect' means to examine something carefully, while 'Vivisect' means to dissect or cut open a living organism for scientific examination - it's a much more invasive, intensive form of inspection.

Option A: Observing is not necessarily a more intensive form of enquiring; these are different activities.

Option B: Exploring isn't a more intensive version of inquiring

Option C: Investigating means to examine systematically, while interrogation is a more intensive, direct questioning of a person. This shows progression from a general examination to a more intensive, targeted approach. This option best captures the relationship.

Option D: A query is a question, while a survey is a broader collection of information, not a more intensive version.These are opposite actions, not varying intensities of the same action

Option E: These are opposite actions, not varying intensities of the same action.

Therefore, Option C is the correct answer.