The diagrams above are the illustrations of organisms from different habitat. Study them and answer questions 32 and 33.
The structures labelled I are for
The shell of snail and the spines of a cactus both serve as physical defenses. The shell of the snail protects it from predators and physical harm in the environment while the spine of the cactus prevents water loss and also prevent the cactus from being eaten by herbivores.
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