Final Answer:
Savanna plants often have adaptations for water storage, allowing them to endure periods of drought. This is a crucial mechanism for their survival in arid environments. The answer is B) Water storage.
Step-by-step explanation:
In savannas, where drought is a common challenge, many plants have evolved specific adaptations to survive periods of water scarcity. Among the provided options:
Spines (Option A) are more characteristic of adaptations to deter herbivores rather than directly related to drought resistance.
Water storage (Option B) is a key adaptation. Plants often have specialized tissues or structures that store water, allowing them to endure prolonged periods without rainfall.
Growth patterns (Option C) can be related to water conservation strategies, but this is a broad category that may include various adaptations.
Bitter taste (Option D) is typically a defense mechanism against herbivores but is not directly related to drought resistance.
Tall stems (Option E) can be an adaptation for capturing sunlight, but they might not be specifically linked to drought resistance.
Therefore, among the given options, water storage (B) is the adaptation most directly associated with aiding savanna plants during droughts.