How does the distribution of auxin affect plant growth in response to gravity?

The correct option is It causes unequal growth, leading to bending. This answer is correct because it matches the approved learning objective to describe gravitropism, or geotropism, as a plant growth response to gravity in the subtopic Control and coordination.

The correct option is It causes unequal growth, leading to bending. It causes unequal growth, leading to bending is correct because it directly supports the approved learning objective to describe gravitropism, or geotropism, as a plant growth response to gravity. This belongs to the subtopic Control and coordination within Plant hormones (biology only), so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Control and coordination.