An autotroph is an example of a producer, something that builds its own nutrients from molecules such as carbon dioxide and water. In this case, the correct answer is d. A hawthorne tree uses the process of photosynthesis to produce nutrients such as simple sugars which can then be used to build organic molecules inside the plant to fuel respiration and other biochemical processes.
The tibialis anterior muscle dorsiflexes the foot at the ankle and also assists in inversion of the foot. The tibialis anterior is a muscle that originates in the upper two-thirds of the lateral surface of the tibia and inserts into the medical cuneiform and first metatarsal bones of the foot, it acts as dorsiflex and invert the foot.