Answer:
0.01%
Step-by-step explanation:
According to the ten percent rule of energy transfer, whenever energy is transferred from one trophic level to a higher trophic level only 10% of total energy available at the lower level gets transferred to a higher one.
Therefore, when the energy is transferred along with the food chain:
grass → grasshopper → mouse → snake → hawk, from grass to hawk there is a loss of 10% of energy at each level.
Therefore, the hawk only gets 0.01% of the energy from the grass.