Answer :
Answer: a. vector.
Vector is the vehicle that brings an agent(pathogen) into the host. One of the examples of the vector would be mosquitos. Mosquitos can take blood from a person that infected by malaria parasites or dengue virus. After that, the mosquitos will fly to other person and introduce the agent taken earlier.
Vector is the vehicle that brings an agent(pathogen) into the host. One of the examples of the vector would be mosquitos. Mosquitos can take blood from a person that infected by malaria parasites or dengue virus. After that, the mosquitos will fly to other person and introduce the agent taken earlier.