Final answer:
A theoretical framework guides a researcher's study by defining concepts and variables. Deductive reasoning is commonly used in research to make predictions or draw conclusions.
Step-by-step explanation:
Theoretical framework refers to the conceptual framework that a researcher uses to guide their study. It provides a foundation for the research by defining the concepts, theories, and variables that will be explored. A theoretical framework helps to organize knowledge and serves as a lens through which the research questions can be examined.
Deductive reasoning is a type of logical thinking that is commonly applied in research. It starts with a general principle or hypothesis and uses it to make specific predictions or draw logical conclusions. For example, if the hypothesis is that all cats have fur, and you encounter a cat, you can deductively reason that it has fur.