Answer:
1. Collapsed.
2. Homes.
3. Children.
4. Bicycle.
Explanation:
In English language, a subject can be defined as the person, thing, idea or place that performs an action.
On the other hand, an object refers to the person, thing, idea or place that receives an action performed by the subject.
This ultimately implies that, a subject and an object have a contrasting function.
1. The wall <u>collapsed</u>: collapsed is the object.
2. During the war, many people lost their <u>homes</u>: homes are the object.
3. I promised the <u>children</u> a trip to the zoo: the children are the object.
4. Mercy hired the <u>bicycle</u>: the object in this statement is the bicycle.