Black Friday, originally an American tradition, takes place the day after Thanksgiving. It (1) __________ the beginning of the Christmas shopping season. The term "Black Friday" was first used in the 1960s (2) __________ the heavy traffic and crowded stores, but later, it was used to express that retailers are beginning to make profits.

Over the years, Black Friday has grown into one of (3) __________ shopping events globally. In fact, many stores see their sales for the year increase during this one day. For example, in 2020, Americans spent over $9 billion on Black Friday alone.

(4) __________, it's important to be careful when shopping. Some deals may not be as good as they seem, and scams are common. Some stores may advertise products as being "marked down," but in (5) __________, they're just showing the original price. For example, they might advertise a product as costing 50 dollars after a 50 percent discount, even though that was the original price.

1. From birth to 3 months, babies begin developing emotional and social connections. At around two months, babies learn that others can comfort, feed, and entertain them. They cannot talk, so we can't understand what they want to do. That's why a significant milestone is when babies first smile. It can be a sign of pleasure or friendliness.

2. As babies grow, their social skills improve. By three months, they begin "talking" through smiles, then wait for a response from others. They also show preference for certain people, especially their parents, while reacting differently to strangers. This social interaction helps babies build trust and confidence.

3. Babies also learn to communicate their needs. When in pain, they express themselves through crying or body language. At other times, they may play on their own, showing that their needs are met. When they cry, this might signal hunger or something that makes them feel uncomfortable. Sometimes, they cry just to get other people's attention.