  In this paper we provide a full characterization of cyclic composition
operators defined on the d-dimensional Fock space $\mathcal F(\mathbb C^d)$ in
terms of their symbol. Also, we study the supercyclicity and convex-cyclicity
of this type of operators. We end this work by computing the approximation
numbers of compact composition operators defined on $\mathcal F(\mathbb C^d)$.
