Gh? I think hope this helps
Shortsightedness refers to the situation where the eyeball becomes to long so therefore light extends the retina and the persons finds it difficult to view things near him.It can be cured by using concave lens
after careful thinking and research and reading i am pretty confident its D
but dont take that answer because its pretty sketchy. so wait till someone else answers, because C also fits into the equation at some point. but yeah mainly D
Bio-geographic isolation is the separation of part/a whole species due to either biological or geographical reasons.
Biological could be lack of food, or a more preferable source of food somewhere else, etc. Geographical could be rivers, oceans, mountains, etc.
