Choose the option that expresses the same relationship as the following :

Tobacco : Cancer

Mosquito : Malaria

The relationship between the options is that the first item is a cause or a contributing factor to the second item. In each pair:

I) Tobacco is a cause of Cancer

II) Mosquito is a vector that transmits Malaria

III) Milk is a component of Food

IV) Bud is a part of a Flower

V) Soil is a factor that contributes to Erosion