Which organism is a carnivore?

giraffe
elephant
lion
bear

Plants that have reproductive structures called cones are?

Number and variety of living organisms includes genetic, species, and ecological types

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?