Final answer:
Obtaining a Protector Crest at Tier 2 gives a Protector Emblem and a Garen champion. The update on 1/20/22 did not change the effects of the Protector Crest; it still remains the same.
Step-by-step explanation:
The effect of obtaining a Protector Crest at Tier 2 in a game is that it grants a Protector Emblem and also grants a Garen. This means that when a player receives the Protector Crest, they receive an item that can be equipped to a champion to turn them into a Protector, and they are additionally given a Garen champion. The update on 1/20/22 did not introduce any changes to the Protector Crest's effects. Therefore, the correct answer to the student's question is: 4. The effect of Protector Crest remains the same; there was no change on 1/20/22.