The correct explanation for why we do not feel the Earth`s high speed of approximately 4400 km per hour is option 2: Our relative speed with respect to the Earth along the Earth`s orbit is zero.
Option 1 states that we are too small compared to the size of the Earth, which is true, but it does not explain why we do not feel the high speed. Our size is not directly related to our perception of speed.
Option 3 states that the gravity of the Earth constantly pulls us towards the Earth`s center. While this is true, it is not the reason why we do not feel the Earth`s speed. Gravity affects our motion and keeps us on the surface of the Earth, but it does not nullify the sensation of speed.
Option 4 mentions that the solar system as a whole is also moving. While this is true, it is not the reason why we do not feel the Earth`s speed. The motion of the solar system as a whole does not directly affect our perception of the Earth`s speed.
Option 2 correctly states that our relative speed with respect to the Earth along its orbit is zero. This means that we are moving at the same speed as the Earth and in the same direction. As a result, we do not