Is it possible if no one take care of their culture and traditions it can be forgotten?
Behavior and lifestyle will be changed because of modernization.

It's possible, as you can see, as we progress some cultural beliefs and traditions are replaced with something new. The old ones are sometimes forgotten, there are some group of people who preserve culture and traditions, however, it's sad that people who were born in this new generation are not aware of some of their country's traditions and culture.