Answer:
a.Yes; this is a concluding strategy known as a reference to the introduction.
Step-by-step explanation:
when Sheila give speech about her friend of eating disorders with explain how her friend battle against this disease so she reference to the introduction her because The purpose of these instructions in the concluding introduction is to allow listener to think about where it came from or to support the facts.
so correct option is a.Yes; this is a concluding strategy known as a reference to the introduction.