Intake
The intake stroke of an internal combustion engine may be considered as the start of the cycle. Here, the air/gas mixture enters the combustion chamber and is then compressed. After the compression, the mixture is ignited to drive the piston upwards and turn the shaft to which the piston is connected, driving the vehicle forward.
1. B
2.D
3.C
4.B
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Answer:Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. Earth is special because it is an ocean planet. Water covers 70% of Earth's surface.