Assess what makes a proposal more challenging to write

Please respond to the following:

Assess what makes a proposal more challenging to write than other forms of technical writing covered in this course.
Refer to your textbook and think about how considerations such as organization, professional tone, readability, relevance, and so on may need to be approached differently in a proposal compared to other forms of technical writing.
Determine when you might present an informal proposal as an email. Provide an example to illustrate your point.