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Answer:
<em>b. an Operational Definition</em>
Explanation:
An <em>operational definition is the expression of conceptual model (or procedural statement) used to define the terms of a method required to determine the essence of an objec</em>t or an occurrence and its characteristics including period, volume, spatial expansion, chemical properties.
A valid statement concerning the Catholic Church during the Middle Ages is that it became very rich and powerful during that time. People would give church 1/10th of their earnings in tithes. The Church also received money in the form of payment for various sacraments such as baptism, marriage, and communion. Also, the Church was a powerful force in medieval life, dominating everyday life for the majority of people. It could also confirmed kings on their throne giving them the divine right to rule.
Answer:
2.B-mining and drilling has increased 3.D -migration
