Foreign language instruction should begin in kindergarten

See the mistake and understand the problem

If you read through this highlighted version you should see the problem immediately. There is way too much repetition. This matters because to get a good score in grammar and vocabulary you need range or variety.

There are various reasons why more people are suffering from stress today. One reason is that because of the pace of life nowadays we do not find time to relax. Another reason is the fact that many people find it hard to achieve a good work-life balance because they are under so much pressure to produce results in their job. The final reason is the fact that people feel increased stress because they need to earn money because the world we live in is more and more commercial.

The problem is just one structure is use Reason → because