The elements that they included in the drawing contribute to the centraltheme because they add details to it.
<h3>What are the details?</h3>
The details are a series of characteristics that stand out as fundamental for the definition of something. For example, different objects are displayed on the chart and they all contribute to the definition of this image.
According to the above, the different elements included in this drawing contribute to the central theme because they reinforce it and give it greaterimportance.