What do flat Earthers think causes the "magical downward force"?

They don’t know - and not all of them agree that there is a “magical downward force”.

If (2) was the case - then the acceleration would have to be EXACTLY the same everywhere - and it’s not.

If (3) was the case - you’d have the same problems as (1) - but this weir...

Is it possible for sisters to have different skin, hair colours, and hair types? E.g. hair= wavy, afro, straight, curly, black, brown, blonde, red. Skin colour: brown, peach, light brown and more.

2. Gravity does not exist - the Earth is accelerating upwards at 9.8 m/s2 which seems like gravity.

…and there are probably other ideas out there.

I have heard them say:

Netanyahu says ‘we’ll do what we need to do’ with Iran’s leader - Financial Times

4. Gravity doesn’t exist - things are held down by air pressure.

If (1) was the case - the center of gravity of the Earth would have to be so deep down to avoid gravity pointing off at an angle when moving towards the “rim” of the flat earth that the difference in height of a mountain would be negligible and we would get very, very nearly the same gravity everywhere.

3. Gravity doesn’t exist - it’s a form of magnetism that works on non-metals.

What is the most heartbreaking thing your child has told you?

1. Gravity is real - but the Earth’s disk is very thick so the force is very nearly vertical.

The trouble with (1), (2) and (3) is that these cannot explain why the force of gravity varies with height above sea level…less at the tops of mountains - more in valleys.