Nowadays the population in many countries indeed has a tendency to become older. There're several benefits of this; however, a higher proportion of older - group is likely to be a disadvantage for the development in the future.
On the one hand, societies benefit from the old. Firstly, today many youngsters only pay attention to work and their own life( trước và sau and phải đồng nhất) , forget ( câu có 2 động từ chính là sao? pay-forget ?) the value of family. Therefore it is better to have seniors like grandparents to take care of all the members in family ( the family) and connect one to each other. Especially, grandparents can look after their children instead of hiring a baby sitter. Secondly, comparing the rate of crime between the old and the young has a clear difference. While elder people usually live in a methodical way and law-abiding ( trước và sau and phải đồng nhất chứ) , youngsters choose a free, indulgent life,( ơ, sao phẩy giữa 2 tính từ vậy , 1 cụm danh từ mà ) breaking the law and gradually become a bad guy. ( chỗ này dài dòng sai ngữ pháp nè, a bad guy như thế nào- phải nói rõ là họ commiting crimes luôn để support ý bạn vừa nêu trên nhé) Finally, seniors are seemed to have more experience than the young in view of the fact that they have undergone many different challenges in their developable process.( thì sao? Việc đó có lợi gì cho societies? Chưa hoàn thành ý)
On the other hand, I believe the aging of the population will be a burden for the societies. There will full ( động từ chính của câu đâu ta?) of old-fashioned things ( things là từ rất chung chung, nên hạn chế dùng trong văn viết ) and superstitions if societies have too many old people. As a result,the country cannot be renovated in a better, modern way.( sao tự nhiên 2 tính từ đang diễn đạt lại phẩy?! ) Young people who are strong , active and creative have an ability to innovate life significantly not like the old, slowly and cornily.( sai ngữ pháp quá nè, not like là văn nói nha, diễn đạt hết ý đừng phẩy giữa 2 tính từ chứ) . Moreover ,it is said that retired parents or old people might be an encumbrance for young families. Not only is it expensive to support them who have little or no money but also those are (those who are )often ill and need a great deal of the care ( a great deal of care) can be too much for their busy offspring.( câu này cũng lủng củng quá nè)
To sum up, besides the good point and downside of the high rate of the old , young -group and old-group should stay together with the equation of proportion.
Bài bạn sai ngữ pháp cơ bản nhiều.