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Which element provides strength to the exoskeleton of clams and oysters

Sarah is sitting at the top of the slide in the schools playground. which will increase sarah’s kinetic energy a- an additional child is added to the top of the slide. b- sarah is pushed and moves down the slide. c- sarah climbs down the ladder and off the slide. d- the ladder is moved to the other side of the yard.

Which process is represented a.) deletion b.) nondisjunction c.) translocation d.) insertion