The "number of pets owned" refers to the total count of animals kept by individuals or families. This can include common pets like dogs, cats, birds, and fish. The number can vary widely, with some households having just one pet, while others may have several. Factors influencing the number of pets owned include personal preferences, living space, and financial resources. Some people may choose to adopt multiple pets for companionship, while others may prefer a single pet for easier care. Local laws and regulations can also impact pet ownership limits in certain areas.