I believe it's D.
hope this helps
D. Hat, a direct object is an object/ thing that is being used in a sentence a certain way. " I left my keys in the house" Keys is the direct object
Knowing that vectors are the host that carry the pathogen and help transport it around, the mosquito would be the vector. The reason for this would be the fact that Jeremiah contracted this illness from a mosquito after being bitten. Since vectors would only be a good vector if they are not infected by the disease, a mosquito would be a wonderful host for the malaria pathogen to spread itself around.
Speaking english will help because than the co workers will understand u and u will also understand them. Also english is a language lots of people know which will also help u in the future