This question lacks options, however, it can be answered based on general understanding of forest layers.
The difference in photosynthetic rate is as a result of the amount of sunlight received by plants in the canopy and the forest floor.
Explanation:
Canopy of a forest refers to the collection of the crowns of trees found above the ground layer of a forest while the forest floor is the ground level of the forest. Plants that grow in the canopy are directly exposed to sunlight and receives most of the light from the sun while plants that grow in the forest floor are least exposed to sunlight as the crowns of the plants in the canopy covers/masks them.
Based on this, the rate at which the plants in the canopy layer photosynthesize will he higher than that of the plants in the forest floor because the amount of sunlight is a determinant of the photosynthetic rate.
Growth Hormone deficiency is a medical condition wherein the pituitary gland is not able to produce enough growth hormones also known as somatropins. This can be acquired either in childhood or adulthood. This condition is called hypopituitarism. Hope this is the answer that you are looking for.
