I don't know for sure but i think that it is because the force him pushing her pushed him back as well
Hope i helped
A how our planets and moons formed
The main (and only) purpose of the turbine in the turbo jet engine is to drive the air compressor. The turbojet engine works by compressing the air using an inlet and a compressor, then mixing the fuel with the compressed air, then passing the mixture to the combustor, then passing the high pressure air through a turbine and a nozzle.
I believe the answer is 3). The cell wall provides protection, it doesn’t control movements of materials in and out of the cell.
