Eagles catch fish in rivers with their tolons. they fly with the fish to a tree branch and
tear the fish into small pieces. which bird most likely catches and eats its food the
way an eagle does?

Is there a list of birds, if not, it could be a seagull. They are arounf the water a lot and have sharp beaks which could possibily allow them to eat the same way as the eagle.

b. is the answer hoped i        

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.