Rivers and ponds contain poisonous chemicals that imperils your lives.
B. Langerhans cells transport harmful substances to white blood cells.
I think this is the correct answer, Good Luck!
Answer: A is the correct answer. Our scientific knowledge has come from all places around the word. From north africa to the middle east, to india and china.
The only reason that we are so far ahead is because we have interacted with other peoples who have skills and knowledge that we didnt have.
Hope this helps.
This is an unanticipated problem and not an adverse event.
are there any multiple choice answers? this is an educated guess and i dint want it to be incorrect.