In the poem, the word "bumped" means that one of the monkeys hit or collided with his knee against something, causing pain. It refers to a minor accident or collision.

Meaning of "bumped" in the poem:

The word "bumped" in the poem refers to the action of hitting or colliding with something. In this context, it suggests a physical contact or collision between two objects or individuals.

Explanation:

- The word "bumped" is a verb that indicates a physical action, where one object or person comes into contact with another object or person.
- In the given options, the correct answer is option 'B' which is "Hit". This means that the word "bumped" in the poem is used to describe the action of hitting or a collision.

Importance of the word "bumped" in the poem:

- The word "bumped" helps to create a vivid image in the reader's mind as it suggests a physical impact or collision. It adds a sense of action and movement to the poem.
- The use of the word also creates a sense of surprise or unexpectedness, as bumping into something or someone is often unintentional and can be a sudden event.

Alternative options and their explanations:

- Option 'A' - "Climbed" does not accurately represent the meaning of the word "bumped". Climbing refers to ascending or scaling something, whereas "bumped" implies a collision or impact.
- Option 'C' - "Hugged" does not accurately represent the meaning of the word "bumped". Hugging refers to embracing or holding someone tightly, which is different from the physical contact implied by "bumped".
- Option 'D' - "Laughed" does not accurately represent the meaning of the word "bumped". Laughing refers to expressing amusement or joy, which is unrelated to the physical action of bumping into something or someone.

Conclusion:

In the given poem, the word "bumped" is used to describe a collision or impact. It adds a sense of action and surprise to the poem, creating a vivid image in the reader's mind. The correct option is 'B' - "Hit".