Is that cancel is to cross out something with lines etc while suspend is to halt something temporarily
Answer:
Undirected, because they are not being told what to do, so they are not being directed.
I think you did some activity where you kept track of your heart rate and based on your knowledge of the circulatory and respiratory system you need to explain how your heart rate changed and why your heart rate changed.
The answer to your question is A: Drug Abuse. I hope this helped. :)
What are the options? I'd say salmonella if its an option