This question asks us to identify the correct suffix that can be added to the word Paint to form a new, meaningful English word.

Identifying the Correct Suffix for 'Paint'

We need to examine each suffix option provided and see if adding it to the base word 'Paint' results in a valid English word.

• Option 1: ___er
  Adding the suffix 'er' to 'Paint' forms the word Painter. A 'painter' is a person who paints (e.g., an artist or a decorator) or a type of paint. This is a valid English word.
• Option 2: ___ly
  Adding the suffix 'ly' to 'Paint' would theoretically form 'Paintly'. However, 'Paintly' is not a standard or commonly recognized English word. The suffix '-ly' typically forms adverbs from adjectives (e.g., quick -> quickly).
• Option 3: ____en
  Adding the suffix 'en' to 'Paint' would create 'Paiten'. This is not a recognized English word. The suffix '-en' is often used to form verbs (e.g., soft -> soften) or adjectives (e.g., wooden).
• Option 4: ____ion
  Adding the suffix 'ion' to 'Paint' would create 'Paintion'. This is not a standard English word. While 'painting' (using '-ing') is a related word referring to the action or the artwork, 'paintion' is not correct.

Conclusion on Word Formation

Based on the analysis, the only suffix that correctly combines with 'Paint' to form a new, valid English word is 'er', resulting in the word Painter.

Therefore, the correct suffix is ___er.