Final answer:
The complete subject of a sentence consists of the main noun and all the accompanying modifiers that provide more information about the noun. In the sentences given, 'My little brother,' 'His Uncle Bob,' 'Those soldiers,' and 'Our babysitter' are each examples of a complete subject.
Step-by-step explanation:
Identification of Complete Subjects
The complete subject in a sentence includes all the words that tell who or what the sentence is about. In the sentences provided:
A) My little brother is the complete subject as it tells whom the sentence is about.
B) His Uncle Bob is the complete subject.
C) Those soldiers are the complete subject.
D) Our babysitter is the complete subject.
The complete subject will quite often include descriptive words, or determiners that give more information about the noun that is the main subject.