Answer:
b) dumping used oil into street drains
Explanation:
by injecting the weakened virus into your body it helps the body familiarize and create the right antiviruses for the virus so that if it ever gets in your system you can actually fight it.
hope that helps <3
True because since there are not many ways for them to erode they can thrive
D) Amphibia was considered to be the first to develop lungs
