Lkelly has brown hair, blue eyes, and a quiet voice. what genetic component determines these features of kelly? dna, rna ,ribosomes, uracil

The genetic component that determines the features of Kelly is the DNA,
DNA is the hereditary unit of the living organisms through which some characteristics are passed from the parents to the offspring. DNA is stored in the nucleus of the cell and is responsible for giving instructions to the cell all through the life span of the cell. 

These characteristics of water allows excellent working in the steam engines.

Explanation:

It is very important that the heat capacity, latent heat of fusion and latent heat of vaporization of water are high because due to large heat of vaporization, steam or vapors of water carries a huge amount of thermal energy. This large amount of heat energy is released when the steam condenses due to loss of kinetic energy. This property of water making it an excellent working fluid for heat engines as compared to any other fluid.