What is found at the center of a syncline?
a.) the softest layer of rock
b.) magma
c.) the youngest later of rock
d.) the oldest layer of rock

ok

explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.