Every type of cell is capable of regeneration from bacteria to humans to animals.
They should all start with sunlight. The 2nd one, sunlight, grass, zebras, lions is the right answer.
Build up of FRICTION has been used to try to predict earthquakes, should be the write answer.
The correct answer is C. Trees provide oxygen for humans, so by reducing trees you reduce oxygen available for humans.
One's material and one's apparatus?