A closed space zone is one that is obstrutced in some way.
Hope this helps :)
Answer:
A
Explanation:
The answer would be A because when feet push down on anything, the force will push down the skateboard
C. is correct. when you make a pizza, you see the the meat or pepperoni or cheese heating up and sometimes melted. (thats physical). on the inside the crust in heated and the toppings are cooked (chemical)
Answer: an earth wire and a fuse can protect an ipad with a metal casing because an earth wire is strong and a fuse is basically a force and if you put them together the work like really good
Explanation:
idk i was just guessing sorry