Final answer:
For algae, the main benefit of creating drought-resistant structures is to retain moisture during droughts, ensuring their survival.
Step-by-step explanation:
To an alga, the main advantage of producing drought-resistant structures is b) They help retain moisture during dry periods. These adaptations, such as a waxy cuticle on succulents or sunken stomata on fleshy leaves, reduce water loss through transpiration and help the plant survive in arid conditions. During droughts, having structures that conserve water is crucial for an organism's survival, as it allows the plant to maintain vital biological processes until favorable conditions return.
The main advantage of producing drought-resistant structures for an alga is that they help retain moisture during dry periods. These structures, such as waxy cuticles and sunken stomata, reduce the loss of water through transpiration. By conserving water, the alga can persist on land and survive in dry habitats. It also allows the alga to store water and utilize it when needed.