In an area next to a rive, there are many trees, in this area, very little erosion occurs. which of the following best explains this. A the trees provide the soil with shade. B the tree roots help hold the soil together. C the tree contains bacteria. D the tree roots absorb water in the soil.

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?