Question

birds and reptiles share a number of inherited characteristics
conditions in an organisms environment ensures the organisms survival
tigers are so different from cheetahs
well - adapted species have many offspring
the principle of common descent helps explain why

Explanation:

The principle of common descent states that all living organisms are derived from a common ancestor. Birds and reptiles sharing inherited characteristics aligns with this principle, as it suggests they evolved from a common ancestor and retained those traits. The other options: the blue one relates to natural selection (environment and survival), the orange one is about different species (not common descent), and the green one is about reproductive capacity (not directly common descent).

Answer:

birds and reptiles share a number of inherited characteristics