Fill in the blank with an appropriate option.
Illusions are usually related with ______ processes.

Correct option is B

The correct option to fill in the blank is (b) visual.
Explanation: Illusions are typically associated with seeing something that is not real, hence they relate to visual processes.
(Hindi meaning: दृश्य प्रक्रियाएँ)
Example: Optical illusions are tricks played on the brain through visual processes.
Why other options are incorrect:
· (a) Oratory: Related to speech delivery (वाक्-कला)
· (c) Digital: Related to technology or data (डिजिटल)
· (d) Audio: Related to hearing (श्रवण)