Question

1. which description shows the transmission of a disease by indirect contact?

person a has a cold -> person a sneezes near uninfected person b
person a has acne -> person a and person b are physically intimate -> person b does not develop acne
person a has malaria -> mosquito bites person a -> mosquito bites uninfected person b
tick infected with bacteria that causes lyme disease -> tick bites uninfected person

Explanation:

Indirect contact transmission involves a vector (an intermediate agent). Malaria transmission via a mosquito (a vector) fits this. Sneezing (droplet - direct in some views), acne (not transmitted easily as shown), and Lyme disease (tick as vector but the first - stage is tick - bacteria, not person - vector - person as in malaria case here).

Answer:

Person A has malaria -> mosquito bites Person A -> mosquito bites uninfected Person B