concise and exact use of words in writing or speech.
Yes because "the box of toys has been tipped over" and "the children will pick it up" can stand on their own, and since they are combined into one sentence it is a compound sentence.
1.a.
2.b.
3.d.
4.c. ...............
D-Mice
Explanation:
sorry for the confusion it is d. mice is a plural for of mouse