Answer: Leucine, isoleucine and alanine.
Step-by-step explanation:
Leucine, isoleucine and alanine belong to a group of amino acids called nonpolar amino acids. They have R groups which are aliphatic in nature, which makes them hydrophobic (afraid of water). Proteins that contain these amino acids when present in aqueous solution, tend to fold into a three dimensional structure, burying the hydrophobic side chains in the inner part of the protein structure.
Lysine belongs to a group of amino acids called basic amino acids. Their side chains can accept a proton, thus basic.