Why do you think the backwash is often weaker on a pebbly beach?

Drought resistance because they are close to a lot of supplys 

I’m guessing probably a

The bottom part thats where most farming goes on

It's probably because the earth is actually tilted and is not straight when orbiting the sun. that's why when it's winter here, it's summer in the southern hemisphere. in the wintertime in the northern hemisphere, it's colder here because it's tilted away from the sun and the southern hemisphere is tilted closer to the sun (i believe this is the case anyways)