In the sentence identify the segment that contains a grammatical error.
From my experience in mountain climbing I have learn that physical fitness is very important.

Correct option is C

Option (c) contains an error.
Explanation:
The verb “learn” should be in the past participle form “ learned” (or “learnt” in British English) when used with the present perfect tense “have”.
Correct sentence: From my experience in mountain climbing, I have learned that physical fitness is very important.
Grammatical Rule Used:
In present perfect tense:
Subject + has/have + past participle (V3)
Example:
· I have completed the task.
· They have gone to the market.
Information Booster: Common past participles:
· write → written
· go → gone
· learn → learned / learnt