  In this paper, we describe the simple isotropic decompositions of the curve
sections of the known Enriques-Fano threefolds. The simple isotropic
decompositions allow us to identify the irreducible components of the moduli
space of the polarized Enriques surfaces. Thus, our analysis will enable us to
show to which families of polarized Enriques surfaces the hyperplane sections
of the Enriques-Fano threefolds belong.
