The answer is; the skeletal system and the nervous system
The skeletal system (muscle and bone) give you rigidity and enable your legs to support your weight. The muscles also act on the bone as a fulcrum allowing it possible for them to contract and make motion possible.
The nervous system is important in the coordination of movement. The brain is the center for locomotor action. This ensures you are able to place one foot in front of the other in sequence and moving your arm in concert.
Probiotics
and why is down below
Probiotics: <span> Probiotics are live microorganisms that may
be able to help prevent and treat some illnesses. Promoting a healthy
digestive tract and a healthy immune system are their most widely
studied benefits at this time. These are also commonly known as
friendly, good, or healthy bacteria.
That is why i would prescribe it
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Answer: I'd say the answer would be (A)
Explanation:Depending on the Anphibian, they breathe through their lungs and skin at first and develope Gills later in life. Some are born with gills and lungs. But normally they start with lungs first.