The factors that contributed to the land becoming a suitable environment for the emergence of the first land plants include:
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New nutrient-rich soil made of cyanobacteria and deteriorating rock - This provided essential nutrients for plants to establish themselves and thrive.
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Abundant sunlight for photosynthesis - Sunlight is crucial for photosynthesis, which is how plants produce energy and grow.
The evolution of animals and levels of oxygen would have been important for the broader ecosystem context, but they were not direct factors in making land suitable for the first land plants. Thus, the correct answers are:
- New nutrient-rich soil made of cyanobacteria and deteriorating rock
- Abundant sunlight for photosynthesis