Which is not a vector that carries and transmits pathogens to humans and other animals?

Some virus or bacteria that is transmited without a carriage, as a sexual transmited disease

Explanation:

Usually vectors are animals, and mainly arthropods (mosquitoes, ticks, beetles, fleas, etc).

There are 5 ways to transmit a disease

Oral: by eating it, vector: some arthropods carry the disease and passed it out, fomites: something like a knife has a pathogen and when you cut yourself you get infected, aerosol: is in the air, zoonotic: as an example if a rat bites you and you get infected with rabia, direct contact: as an example when someone pass HIV to other person through sexual contact

the answer is c.) there is a warm front in region a and a stationary front in region b.

answer; ///segregation;