Step 1 — Understand the word 'well':
The word well is highly flexible in English and can function as a verb, adjective, noun, and adverb depending on its usage in a sentence.
Step 2 — Check each usage:
1. Verb: “Tears well up in his eyes when he reads the letter.” → Here, well means to rise up or gush out. This is a correct verb usage.
2. Adjective: “They played hard. It was a well-deserved victory.” → Here, well-deserved works as a compound adjective, describing the kind of victory. Correct usage.
3. Noun: “You never miss the water till the well runs dry.” → Here, well means a deep hole or source of water. This is correct as a noun.
4. Adverb: “The children behaved well.” → Here, well modifies the verb behaved and explains the manner of behavior. Correct as an adverb.
Step 3 — Conclude:
All four usages — as Verb, Adjective, Noun, and Adverb — are grammatically correct.
Answer: The correct match is All of the above (1, 2, 3, and 4).