Four scientists investigated passive smoking. The table below shows the number of people each scientist studied from each group. Which scientist is likely to get the most reliable results?

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

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,