Step 1: Understanding Homogeneous Catalysis
Homogeneous catalysis occurs when the catalyst and the reactants are in the same phase, typically liquid.
The intermediate theory best explains homogeneous catalysis because it involves the formation of an intermediate complex between the catalyst and the reactants during the reaction.
Step 2: Explanation of Other Options
Option (b) Absorption theory is not directly associated with homogeneous catalysis, as it typically applies to surface catalysis.
Option (c) Nucleate theory is not relevant to homogeneous catalysis.
Option (d) Paratoid theory does not apply to homogeneous catalysis.
Step 3: Conclusion
Thus, the Intermediate theory best suits homogeneous catalysis.