As each codon arrives at the active site of a ribosome, it attracts another molecule containing the anticodon. this molecule is called

This molecule is called the transfer Ribonucleic acid (tRNA).
The trasnfer RNA is a type of RNA molecule that helps decode a messenger RNA (mRNA) sequence into a protein. The tRNAs function at specific sites in the ribosome during translation, which is the process that synthesizes a protein from an mRNA molecule, that contains the codons. 

Bruh i don’t know the answer tbh but you can google it