For (i), the correct verb form is ``holds'' as it matches with the singular subject ``athletics.''
For (ii), the correct verb form is ``waits,'' again matching with the singular subject ``The crowd.''
For (iii), ``culminate'' is correct because the actions of the strides cumulatively lead to the abrupt stop.
For (iv), ``pivots'' fits as it describes the singular action of his body.
Conclusion:
The answers (i) ``holds,'' (ii) ``waits,'' (iii) ``culminate,'' and (iv) ``pivots'' correctly fill the blanks in the given text, leading to the selection of option (D).