What is the meaning of the word "enriching" as it is used in the following sentence?

the experience was enriching for the students.

Which is these is an example of circular reasoning

During editing and proofreading, you do not need to a. check facts b. follow grammar, usage, and mechanics c. scrutinize spelling d. revise overall structure

Choose one of the topics below and use all five sentence patterns in a composition of at least 100 words. return to the lessons "patterns: inverted, compound parts, s/v/do" and "patterns: s/lv/pn, s/lv/pa, s/v/io/do" if you need to review the sentence patterns. you will be graded based on whether all five sentence patterns are present in your work. suggestions for topics: a. what if the sun exploded? b. what if every family owned a helicopter? c. what if each year were six months long instead of twelve? d. what if you were the president of the united states?