Fill in the blank with the correct modal :
Children ______ obey their parents. (Duty / Obligation)

Question

Fill in the blank with the correct modal : 
Children ______ obey their parents. (Duty / Obligation)

Accepted Answer

Option 1, "should," is the correct choice for filling in the blank in the sentence "Children ______ obey their parents." This is because "should" is a modal verb that is commonly used to express duty or obligation, which aligns perfectly with the context of the sentence.

1. **Explanation for Option 1 ("should"):**
   - "Should" is used to indicate a recommendation or a moral obligation. In the context of the sentence, it implies that it is the right or expected behavior for children to obey their parents. This aligns with societal norms and expectations regarding the relationship between children and their parents, where obedience is often seen as a duty.

2. **Explanation for why other options are incorrect:**
   - **Option 2 ("can"):** "Can" is used to express ability or possibility, not duty or obligation. If we say "Children can obey their parents," it implies that children have the ability to obey, but it does not convey any sense of duty or moral obligation.
   - **Option 3 ("shall"):** "Shall" is often used to express future actions or formal obligations, particularly in legal contexts. It is not typically used to express moral obligations in everyday language, making it less suitable for this sentence.
   - **Option 4 ("will"):** "Will" is primarily used to indicate future actions or willingness. Saying "Children will obey their parents" suggests a prediction or intention rather than a duty or obligation, which does not fit the context of expressing a moral expectation.

In conclusion, "should" is the most appropriate modal verb to express the duty or obligation that children have to obey their parents, making Option 1 the correct answer.