1). The vaccine is not 100% effective.
2). There are still people who don't allow their children to be vaccinated. (They don't understand why this is child abuse.)
Make a list
Evaluate Influences
Tips are considered as 'advice, counsel, ideas'. Tips are things that help people to do the right thing. So for example, I would give my sister a tip or an idea on how to work out a word problem. That is what the word 'tip' would be considered as.
I would think it was b The deliverance to oxygen
Because, It's Not Healthy To Drink Animal Or Human Waste Because, It Can Contain Waste Minerals, and Bacteria, And It Could Make You Very Sick And If You Eat To Much, You Could Possibly Die.