They're orbitals containing the electrons react, forming an SP three sigma bond, as we saw here. Once again, individually, these methyl roticals contain SP two hybridized bonds with approximately two p orbital that contains our electrons. But when they come closer, these orbitals become SP three hybridized, which eventually form the bond, forming our ethane molecule. Now, let's look at our electron diagram or energy diagram for these two bonds. So here we have our SP three hybridized bond. They interact.