Topic: verb (ক্রিয়া),

Best Answer Explained in Below-:

The correct answer is B) "lose." In this context, the verb "lose" means to decrease in weight or to become lighter, which directly aligns with the action the fat man is attempting to achieve.

Here's a breakdown of why the other options are incorrect:

- A) "loss": This is a noun that refers to the state of losing something, such as loss of weight. The sentence requires a verb to complete the action, making this option inappropriate.

- C) "loose": This adjective means not tight or free from confinement. It does not fit in the context of trying to reduce body weight, hence it is irrelevant here.

- D) "loosen": This verb means to make something less tight or to free something from restriction. While it has a verb form, it does not pertain to weight and, therefore, does not apply to the situation described in the sentence.

Understanding these differences highlights why "lose" is the appropriate choice for conveying the intended meaning of attempting to reduce weight.