Tertiary structure is the three-dimensional structure that is created through side chains link and folding of nucleic acid or protein. This structure contains single chain of connected polypeptide.This helps in task performance of structure level.
Other options are incorrect because secondary structure ,quaternary structure and primary structure do no represent protein sub-unit. Thus, the correct option is option(c).
your answer would be 13 because i looked on a .gov website and it said that all children until 13 years have to ride in the backseat properly restrained
