What is the purpose of an introduction paragraph?
to tell your reader everything you will say
to introduce your subject
to entice your reader to read more about the subject
to set up a framework for the paper

The purpose of an introduction paragraph is to (set up the framework of the paper/entice your reader to read more about the subject/introduce your subject/tell your reader everything you will say).

Explanation:

The purpose of an introduction paragraph is to (set up the framework of the paper/entice your reader to read more about the subject/introduce your subject/tell your reader everything you will say).

to tell what your story is going to be about.

Explanation:

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.