tennis
I would say tennisball because it has less mass inside it.
Tennis has a longer history than golf. The history of tennis, or variations of what would become tennis, dates back to the 12th century. Golf can be traced back to the 15th century.
Tennis ball
are you joking or.... sigh.....a baseball.
Grass of course! Grass is more solid than dirt.
Concrete
on a tennis court
Hot. Personal experiments have shown that temperatures below 25°C make the ball bounce less. From 25°C and upwards there aren't any greater changes in height of bounce. The balls bounce almost the same.
Because a baseball is smaller you could hit it farther. This is because with less surface area, there is less friction action on the ball. With less friction acting on the ball, it means less "stuff" is holding the ball back from traveling farther, the baseball can physical travel farther than a softball.
In general, yes, but the mass/volume ratios and the surface finishes are different, so the motion would be somewhat more or less pronounced.
Measuring the average kinetic energy of all particles in a baseball would provide information about the temperature of the baseball. The kinetic energy of particles is directly proportional to temperature, so a higher average kinetic energy would indicate a higher temperature.
A tennis ball will bounce the highest because it is smaller. The smaller amount of mass that it has the more it will bounce and the higher it would get. For example, when you put air into a ball the more mass it builds up but, when the ball is flat it would not bounce.