If your doctor asks you if a tick or mosquito has bitten you then you have contracted a vector-borne pathogen.
Vector-borne diseases are infections transmitted by the bite of infected arthropod species, such as mosquitoes, ticks, triatomine bugs, sandflies, and blackflies.
Arthropod vectors are cold-blooded (ectothermic) and thus especially sensitive to climatic factors.
Thus, option "A" is correct.
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