To determine the letter that replaces the question mark in the given pattern, we need to find the logical pattern or sequence based on the given letters. Let's analyze the arrangement:

The pattern shows letters arranged in a circle. The letters are: C, L, D, E, H, Q, L.

Notice the arrangement:

• The letters C, D, E are consecutive letters in the alphabet.
• The letter L appears twice, indicating a possible pattern reset or repetition.
• Between two Ls, we have D and Q, which are six letters apart in the alphabet (D is the 4th letter, Q is the 17th; 17 - 4 = 13, which doesn't fit).
• Observation: Look at the positions where the letters appear twice: L -> D -> ?
• The pattern could relate to placing every second letter from a subgroup or consecutive letters.
• Let's check the possibility of alphabetical order jumps:

Following the consecutive letter \( C \to D \to E \), and the repeat structure with \( L \), suggests a link.

• If considering alphabetical indices, L is 12, Q is 17. Skipping back might give insight.
• Assuming rotational pattern in the circle, check immediate backward skip:

Check against the counterparts:

• Literally trying to match forward skips and estimate: say from H to L, deriving simple skipping, we further observe close interdependence.
• If emphasize completion with alphabetical steps:
• By matching pairs and skips, the statement appears relatable as such: from L —> adds what might reflect back.
• So, logically aligned, instead of guessing: fill back implies the viable letter forward from L gives W.

This aligns forward range stabilization seen.

Therefore, the letter that should replace the question mark is W.

Conclusion: The pattern involves a cyclic organization or rotation along sequences, and ‘W’ fits spatially.