Land breezes and sea breezes both are breezes, that is how they are similar.But they are different because one breeze is blowing from the sea to the land also called a "sea breeze",and one breeze is blowing from the land to the sea also called a "land breeze"
Answer: The literal reason would be because our ancestors did. The ancestors of all modern mammals had five digits on each limb up to 360 million years ago.
