The concept of the of distance is illustrated by the fact that as cost increases with distance,
interactions between people decrease.
a. flexibility
b. erosion
c. friction
d. relativity

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

i think the answer is a and b

i wish you luck