It's easy points... to earn answer question :
Can a Vector be a Human?

Yes or No and explain please

Vector Definition:

An organism, typically a biting insect or tick, that transmits a disease or parasite from one animal or plant to another.

Will give 5 star rating, thanks, and brainliest to best answer

yes

Explanation:

you defined a vector as an organism that transmits a disease from one animal to another,humans have the ability to transmit sickness or diseases from one person to another without always biting the victim

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.