The position of the diver is described as "below a certain point"; therefore, the reference point must be above the diver. For a diver in the middle of his dive, the bottom of the pool, the other swimmers and the far side of the swimming pool are likely to be below the diver, or at level with the diver at most. Out of the options, the only point of reference that is likely to be above the diver is B. the diving board.
Protein Function may be terminated, disrupted, destruction of both the secondary and tertiary structure through the process called DENATURATION. Denaturation process does not break the primary structures since the link or sequence of peptide bond are greatly hold by Hydrogen bonding.