What do mean by a Noun?
A noun is a name of person , thing or place.
Here, budge is one type of verb so the answer is budge

Explanation:

1. Nouns:
Nouns are words that represent people, places, things, or ideas. They are the basic building blocks of sentences and are often the subjects or objects of verbs.

2. Identifying the noun:
To identify if a word is a noun, you can consider the following points:
- Can the word be replaced by a pronoun like "it" or "they"?
- Can the word be pluralized?
- Can the word be preceded by the article "a" or "an"?

3. Analyzing the given words:
Let's analyze the given words to determine which one is not a noun:

a) Budge: This word is not a noun. It is a verb that means to move slightly or change position. For example, "He couldn't budge the heavy box."

b) Cat: This word is a noun. It refers to a small, domesticated carnivorous mammal. For example, "The cat is playing with a ball of yarn."

c) Dog: This word is a noun. It refers to a domesticated carnivorous mammal that is commonly kept as a pet or used for various working purposes. For example, "She took her dog for a walk in the park."

d) Field: This word is a noun. It refers to an area of open land, often used for agriculture or sports. For example, "The children played soccer in the field."

4. Conclusion:
Based on the analysis, the word "budge" is not a noun. It is a verb. Therefore, the correct answer is option 'A' - budge.