Answer:
b. It is a horsetail, and belongs to the phylum Sphenophyta.
Step-by-step explanation:
A horsetail plant is scientifically known as Equisetum and belongs to the phylum Sphenophyta. It is a bushy perennial herb that grows along the riverside in damp soil. The plant body is sporophyte and divided into root, stem and leaves. Stems are jointed with nodes and internodes, internodes with ridges and furrows and hollow. On the nodes of the stem, small scale leaves develop in whorls.