How does evolution work to create the diversity of life on Earth?

What did the first language sound like

Using the periodic table, determine which material is most likely a good conductor

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?