Final answer:
A rocky pool is likely to have more biodiversity than a flat plain due to the rocks providing more surface area for organisms to attach to and creating different microhabitats.
Step-by-step explanation:
In general, a rocky pool is likely to have more biodiversity than a flat plain. This is because the rocks in the pool provide more surface area for organisms to attach to and live on, which increases the number of species that can be supported. The presence of rocks also creates different microhabitats within the pool, allowing for a greater variety of species to occupy different niches.
For example, the rocks can provide shelter and hiding places for small organisms, and the spaces between the rocks can trap organic material, providing a food source for other organisms. In contrast, a flat plain may have less variety of microhabitats and may not provide as many resources for different species.