What part of the essay do the following sentences most likely represent?

Another reason for conserving water is to save money. As this resource becomes scarcer, demand will drive prices higher and higher. Taking water-saving measures, such as replacing exotic landscape plants with drought-tolerant natives, will save you money in the long run.

A. Support

B. Conclusion

C. Thesis

D. Introduction

this part of the essay is clearly adding support ideas to the thesis statement, which is not present but can be enferred from the supporting ideas.

All of the sentences are overtly supporting the same idea, "conserving water saves money", but the stronger expressions are these:

Another reason for conserving water is to save money.

demand will drive prices higher and higher.

will save you money in the long run.

So the final answer is:

A. Support