Heat can never flow from
a. hot to cold
b. cold to hot
c. liquid to solid
d. solid to liquid

The correct sentence is:
Heat can never flow from b. cold to hot.

In fact, heat always flows from hot to cold objects. The reason is the following: in an object with higher temperature, the particles move/vibrate faster than the particles in an object with lower temperature. When the two objects are in contact, therefore, the particles of the hotter object have more energy than the particles of the colder object, so the particles of the hotter object transfer more energy to the particles of the colder object, on average. As a result, heat always flows from hot objects to cold objects.

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.

The best description is: . nobody has any idea what q is.