The correct answer is option 4, which states that all three statements about the Acacia tree are correct.

Explanation:

1. The first statement is true - the Acacia tree has a long shallow root system. This enables the tree to find moisture more easily, as the shallow roots can spread out in search of water.

2. The second statement is also true - the Acacia tree has thorny leaves. These thorns serve as a protective mechanism to prevent water loss. They act as a deterrent to herbivores who may try to feed on the leaves, reducing the chances of excessive water loss through grazing.

3. The third statement is also correct - the Acacia tree has a wide crown. The wide crown allows the tree to have a larger surface area for foliage, which maximizes the absorption of sunlight for photosynthesis. This adaptation helps the tree in its growth and survival.

Therefore, all three statements about the Acacia tree are correct, making option 4 the correct answer.