Topic sentences

Obesity among children is becoming a serious problem in many countries. What are the 
reasons and solutions of this? 
 
In recent times, the level of obesity among children has been progressively rising in many 
socities.
While this has various complex reasons, I can propose some feasible methods in 
which this issue might be handled. 
Childhood obesity stems from several factors,
one of which is the current sedentary lifestyle.
Moreover, as fast food products are now cheap and widely available, 
children are given money to buy them instead of eating home-prepared meals.
Crime is a big problem in many countries. Some people think there is no way to prevent 
crime. To what extent do you agree or disagree? 
In recent years, crime has been an acute global problem, with many countries reporting high 
rates of it.
Some people even view crime prevention as an unrealistic goal.
According to me, 

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however, preventing illegal activities is an attainable mission if governments take proper 
measures and control their spending carefully. 
There are viable ways to prevent criminal activities,
one of which is to impose strict 
punishments like the death penalty. 
They are highly likely to serve as a deterrent for 
offenders and potential criminals, in particular among youngsters.
As well as this, enhancing 
educational opportunities and thereby warning people of the repercussions of breaking the 
law might be another effective solution. 
When one is informed about what is expecting them 
after commiting a crime, they refrain from doing so.
FIRST WAY OF GIVING A TOPIC SENTENCE 
1]Topic sentence 
2]First idea 
3]Explanation 
4]Second idea 
5]Explanation 
6]Body conclusion