- Step 1: Identify the preposition and phrasing. "Based on" is correct but can be improved for style.
- Step 2: Option (1): "Grounded in" is a stronger, formal synonym. Option (2): "Depend on" is incorrect (missing "ed"). Option (3): "Based at" is incorrect preposition. Option (4): "Founded by" is incorrect (implies agency).
- Step 3: Option (1) is the best replacement.