[en] Experimental results on elestic scattering of deuterons, ³He and alpha-particles on ¹²C are subjected to a qualitative analysis. The differential cross sections of the elastic scattering of complex particles with the wave number k approximately 1 Fm^-1 and K approximately 1.3 Fm^-1 are presented. The interaction parameters of ²H, ³He and ⁴H with ¹²C are listed in the table. Factors that can cause variations in the absolute magnitudes of the cross sections depending on the ion used are discussed: 1) the excitation energy and system state structures; 2) the inner structure of a nucleus-target; and 3) the inner structure of an impinging ion. It is concluded that the most substantial effect on the cross sections is exhibited by the impinging ion structure which is primarily manifested through the binding energy