Which of the following describes what it means when objects and verbs agree?

1. They describe the same things.
2. They are not separated by interrupting words.
3. They have the same ending.
4. They are both singular or both plural.

4. They are both singular or both plural.

The correct answer is option 4: "They are both singular or both plural." When objects and verbs agree, it means that the subject (object) of a sentence and the verb are in agreement in terms of number, either both being singular or both being plural. This ensures that the sentence is grammatically correct and expresses the intended meaning clearly. To determine whether objects and verbs agree, you should identify the subject of the sentence first and then ensure that the verb matches the number of the subject.

Option 4. They are both singular or both plural.