Topic sentences

These days, people spend long hours on their mobile phones. Is this a positive or 
negative development? 
Both positive and negative
 
With the development of sophisticated modern technology,
it has been very common to see 
people using their phones a lot.
In my view, this is likely to produce both positive and 
negative outcomes in equal measure. 
 
Mobile phones usually offer a wide range of opportunities.
For a start, they are a fruitful 
source of information. 
If one wants to broaden his/her knowledge and global awareness, they 
can use a large number of platforms like “Google” and websites like “INFO” to fulfill their 
desire to learn. 
This way of studying is both comfortable and cheap for everyone.
Even more 
importantly, cellphones can allow people to get in contact with each other more frequently 
despite the national and political boundaries. 
This, in turn, can help individual, especially 
those studying or working abroad, to overcome feelings of depression, stress, and loneliness. 
Despite these benefits, phone use can be seen from an opposite angle.
Firstly, [first 
disadvantage].
[explanation]. 
Secondly, [second disadvantage]. 
[explanation
]. [body 
conclusion]. 
 
 
 
 

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These days more and more children are becoming overweight. Why is this the case? What 
are the solutions? 
 
In recent times, childhood obesity has been a serious global problem.
While there are various 
obvious reasons behind this issue, I believe governments can handle it through manifold 
proper measures. 
 
There are valid reasons behind the increased level of childhood obesity. 
Primarily, [first 
reason]. 
[Explanation].
In addition, [second reason]. 
[explanation]. 
[body conclusion] 
Nevertheless, there are several ways to deal with this problem.
To begin with, [first solution].
[explanation]. 
Another feasible approach is that[second solution]. 
[explanation]. 
[body 
conclusion]