Explanation
Correct answer: A.
Choice A is the best answer because it most effectively uses data from the graph to complete the assertion about urban agriculture. The graph shows the average survey ratings, on a scale of 0 to 5, from three groups of people—project leaders, stakeholders, and the general public—concerning the contributions of urban agriculture. According to the graph, project leaders gave an average rating of approximately 2 to urban agriculture's contributions to the provision of medicinal plants, which is lower than the average rating of approximately 3 that project leaders gave to urban agriculture's contributions to both improving the local microclimate and improving a sense of attachment to the neighborhood. This shows that project leaders rated urban agriculture as contributing less to providing medicinal plants than to improving the local microclimate.
Why the other choices are wrong
Choice B
Choice B is incorrect because the graph doesn't provide data about urban agriculture's contribution to educational opportunities; therefore, this comparison can't be made.
Choice C
Choice C is incorrect because it contradicts the data shown in the graph. On average, project leaders gave a rating of approximately 3 to urban agriculture's contributions to improving the local microclimate, which is higher, not lower, than the average rating of approximately 2 that they gave to its contributions to providing medicinal plants.
Choice D
Choice D is incorrect because the graph doesn't provide data about urban agriculture's contribution to providing tourist attractions; therefore, this comparison can't be made.