Question

siblings have similar traits because they inherit those traits from a common ancestor. how is this similar to some evidence for evolution?
similarities can be seen between siblings in species today, which shows common ancestry.
similarities can be seen among related organisms, which shows common ancestry.
there are many differences between siblings in species today, which shows common ancestry.
there are many differences between related organisms, which shows common ancestry.

Explanation:

In evolution, similarities among related organisms (like siblings having traits from a common ancestor) indicate common ancestry. Option A focuses only on siblings in species today (too narrow - evolution evidence is broader among related organisms). Option C and D mention differences which don't show common ancestry (similarities do). So, the key is that similarities among related organisms (not just siblings in a species) show common ancestry as in evolution evidence.

Answer:

B. Similarities can be seen among related organisms, which shows common ancestry.