Its d the cell wall. The plant cell contains a cell wall that is absent in a animal cell.
Mendeleev called the rows periods.
Chemical energy, hope this helps. Correct me if im wrong but im sure its chemical energy
The tectonic plates move and shift due to Mantle convection
Mantle convection is caused by the magma in the mantle of the earth constantly being cooled near the crust and heated the closer it gets to the core and like normal convection the cool magma sinks towards the crust and the hot magma rises to the crust. this happens in a circular motion causing the crust to shift with the magma
