premise: a fold is observed in layers of sedimentary rock sent2: if something is caused by something else then that something resulted from that something else sent3: if an event changes something then that event causes that change sent4: the convergence of tectonic plates is a kind of event sent5: sedimentary rock is a kind of rock sent6: a collision is a kind of convergence sent7: sedimentary rocks are formed in layers sent8: a crustal plate means a tectonic plate sent9: the collision of tectonic plates changes the order of the rock layers by compressing rock layers into faults and folds.
hypothesis: the fold observed in layers of sedimentary rock resulted from the covergence of crustal plates