They will both burn the same amount, the intensity is the same, the only things which would really change this is either walking on sand, walking uphill (or downhill). Also point out if planning on doing a lot of walking on either of these surfaces make sure you have a decent pair of running shoes, otherwise your knees, ankles and feet will start to feel it.
As compared to walking on unpaved dirt, walking on rigid pavement is easier, and less dirt sticks to your shoes, especially when it has been raining and the dirt road gets muddy.
Oh, sure. Living bodies always burn calories, you can't stop it. And the more you move, the more you burn. And as bike riding involve a fair amount of movement, it can burn plenty of calories.
You'll be driving in the dirt/grass.
More
Because pavement is smoother.
Yes but the nobbly tyres don't grip on tarmac in the wet.
No dirt can not catch on fire. But it can get really hot and burn.
The road surface where vehicles drive. Could be asphalt, gravel/dirt, concrete, or steel.
Gravel and pavement is hard on their hooves dirt is best for both riding and for their pen.
yes, very much legal...
45 mpg on pavement, any speed on dirt
pigpen is the one covered with dirt and walking around. He will have moving lines around him for dirt