Darwin believed that emotional expressions began as that came to have evolutionary value because they . Select one:
a. physiological reactions; increased the efficiency of bodily reactions
b. communication devices; increased the efficiency of bodily reactions Incorrect
c. physiological reactions; convey emotional states to other members of the species
d. random mutations; convey expectations to other members of the species

i will answer your question if you answer mine

  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

that would be because of both gravity and friction. so     c