The correct answer is C) Shole. A shole is a short flat block that is placed under the end of a shore to distribute the pressure and prevent the shore from sinking into or damaging the surface it is resting on. This helps to stabilize the shore and provide a secure foundation for the shoring system. The other options are incorrect because: A) A beam is a horizontal structural member, not a shoring material. B) A strong back is a vertical supporting member, not a block. D) A wedge is a tapered piece of material used to tighten or adjust the position of a shore, not a base block.