A study at one prison showed that owning a pet can change a…

A study at one prison showed that owning a pet can change a hardened prison inmate into a more caring person. Another study discovered that senior citizens, both those living alone and those in nursing homes, became more interested in life when they were given pets to care for. Even emotionally disturbed children have been observed to smile and react with interest if there is a cuddly kitten or puppy to hold. Animals, then, can be a means of therapy for many kinds of individuals. Which of the following sentences from the above passage would be considered the topic sentence of the passage

North Americans send cards for many occasions. They send car…

North Americans send cards for many occasions. They send cards to family and friends on birthdays and holidays. They also send thank-you cards, get well cards, graduation cards, and congratulation cards. It is very common to buy cards in stores and send them through the mail, but turning on the computer and sending cards over the Internet is also popular. Which of the following best reflects the main idea of the above passage?