The number of heat units needed to raise the temperature of a body by one degree.
I would say Emotional health. Just because it is more sensable
The answer is a because if you look really close
If there is a large enough amount of water vapor in the air and the tempature is hot enough cloud or storms can form.
The best answer to fill in the blank should be ''continuation'' because series means a lot and lines are long, narrow, figures, so its continuation since its constant.
