The answer is us because you are talking about yourself and other pet owners! Hope that helps
D. 3 and 4
3 and 4 lists a few specific examples, such as; Musicians, Writers, Shift-workers and most creative and productive people of society.
Alaska is visited by thousands of people every summer.
* S+V. to be+past participle
The Apache are only one of many tribes that inhabited North America when
the Europeans arrived. Others included the Sioux, the Cherokee, Shawnee,
Pawnee, Mohawk, Seneca, Cheyenne, Owasso, Oglala, Cayuga, Onandoga,
Iroquois, and many more.
