The topic is about why people nowadays are living longer.

Firstly, people live longer because they keep fit. This is because regular exercise makes the body stronger. For example, people who exercise daily often stay healthy for many years.

Secondly, they can prevent diseases such as obesity. The reason is that healthy habits reduce health risks. For instance, people who eat well and exercise rarely become overweight.

Thirdly, they refresh their mind. This is because relaxing activities reduce stress. To illustrate, hobbies like reading or walking help people feel happier.

Finally, people follow a healthy lifestyle because they care more about their wellbeing. For example, they eat clean food and sleep enough.

To sum up, people are living longer for all the reasons above.