<span>Three anatomical features that birds share with their theropod ancestors are:
</span><span>1. they had light, hollow bones
</span>2. they rearranged hip and leg muscles because this of <span>improved bipedal movement
</span>3. they had their flight oriented with the use of wings for balance
Coal Mining is considered the most dangerous job in the United States. Mining also possibly releases harmful chemicals in the environment.
B.) A dog walks to a stream and drinks when it gets thirsty
would have to be your answer..
