Answer:
Coniferophyta, Cycadophyta, Gingkophyta and Gnetophyta
Explanation:
Gymnosperms consist of four main phyla: the Coniferophyta, Cycadophyta, Gingkophyta and Gnetophyta. Conifers are the dominant plant of the gymnosperms, having needle-like leaves and living in areas where the weather is cold and dry.
