The answer is letter B.
Amphibians live near water sources because they
need an area where they can lay and protect their eggs. The early stages of an
amphibian's life is spent mostly underwater. This is where they mature and
slowly develop into land organisms. In the early stage of their life, they
breathe through their gills and they do not have limbs yet. As they grow
gradual changes in their body structures are prominent, this process if called
metamorphosis.
