A. a scientist finds a fossil of a shark tooth in a layer of rock that is high in the mountains what could it mean

The shark tooth became embedded in the sea bed and over time, other fossils and sand washed over it whilst the pressure of the ocean turned it into sediment. As the sediment is moved and the ocean level lowers, the sediment forms part of a mountain

Ifound this on google i hope this you “the correct answer is: the czech republic's decision in 2003 to join the european union indicated that the czech republic was willing to forge economic ties with other nations. the european union is a political and economic organism composed by 28 states located mainly in european lands.”