Which element develop the theme of a text? beginning conflict summary topic

The element that helps develop the theme of a text if the conflict.

Explanation:

Whereas the beginning of a text gives us a brief look at the characters and the setting of the story, the conflict of the text is the key to understand the theme developed. A narrative conflict is the opposal of two sides of something: one of these two sides wants to achieve or to get something and the "enemies" will try to stop that from happening. That situation they are going to fight for will sure be the main theme and from that other themes will be developed, too.