When all vegetation is removed from a site by human activity or by natural forces such as volcanic activity, species are the first to colonize the site?

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google

the correct answer is anaphylaxis.

anaphylaxis is a condition caused by insect bites, foods, medications, manifested by tongue swelling, shortness of breath, vomiting, low blood pressure. it sometimes may occur without an obvious reason. it is treated with epinephrine injection.other tretments include antihistamines and steroids,