x_ p _ y _ _ pzy _ _ pzy

Correct answer: yzxyxy

Explanation:

• Step 1: Identify the basic cycle. The first three letters form the cycle y → z → x.

• Step 2: Continue the sequence. The next three letters continue the pattern so the full 6-letter block becomes y z x y x y (written together as yzxyxy).

• Step 3: Verify against choices. Only the string yzxyxy matches this block; the other choices break the cycle or change the order of letters.

Quick check of each candidate:

1. "xyyyzz": contains three consecutive y's then z's, which breaks the alternating/cyclic pattern.

2. "xyzyzy": starts with x rather than starting the cycle at y → z → x, so the ordering is inconsistent with the pattern.

3. "yxzyxy": has first three letters y, x, z (not y, z, x), so it does not follow the required cycle.

4. "yzxyxy": matches the identified cycle y → z → x followed by y → x → y, so it is the correct choice.