No contractions (do not, is not)
…in order to explain and understand the causes of this offence, it would be useful to apply the criminological theory.
The reader knows that you’ll use theory to explore and explain a criminal offence.
There are several ways in which the new style shopping centres may be seen as attractive.
The reader knows that you’ll include at least two aspects of attractiveness.
Another issue which often concerns feminists is the pay gap.
The reader is reminded that you’ve already covered one issue, and introduces another.