Question

what was the main function of roots in early land plants?
anchoring and absorbing water
producing seeds
releasing oxygen
attracting insects

Explanation:

Early land plants had roots that primarily anchored them to the ground to prevent being uprooted by wind or water. Also, in a terrestrial environment, water availability could be an issue, and roots helped absorb water from the soil. Producing seeds is a function related to reproductive structures (like flowers in angiosperms or cones in gymnosperms), not roots. Releasing oxygen is mainly a function of leaves (through photosynthesis). Attracting insects is often related to flowers (for pollination purposes), not roots.

Answer:

Anchoring and absorbing water