The image is an aerial photograph. what is the geological feature shown? a) a large fault on earth’s crust b) the dry bed of an ancient river c) a canyon, created by the erosion d) sand dunes deposited by the wind

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?