The attitude toward your subject that you convey to your readers which of the following matches the definition?

audience
style
purpose
tone

D) Tone.

Explanation: The tone of a text or sentence is the author's or speaker's attitude towards the audience, the subject or even the characters of the text. There are many different kinds of tones, like: positive, negative, objective, sad, angry, etc. From the given options, the word that matches de definition (the attitude toward your subject that you convey to your readers) is the corresponding to option D: tone.

he will find out what went wrong or happened and how.

there is a sequence and logical steps to give an answer of a trouble.

1) strategy is necessary to develop an project idea.

2) to study and know the environment where you are going to work ( ecosystem).

3)   the materials resources to built the ideas.

4) to give a priority order in the context that you study. in this case human needs.