Because the have hollow bones, feathers, wings, beaks, and they lay eggs
I’m not certain, but I believe it is continental drift
We basicly can't digest them as it has cellulose and we can't digest cellulose .acc. to me in olden days early men used to survive with raw green plants because the cellulose is digested by our appendix but slowly as we stopped eating raw green plants the appendix lost it function tooo. so we should always eat a selective plant like lettuce
Answer:
Your answer would be ( A star has 2 star systems )
Hope this helps have an amazing day........
