1. The problem asks: The solution to a homogeneous recurrence relation can be expressed in terms of which of the following? 2. A homogeneous recurrence relation is an equation that defines each term of a sequence as a linear combination of previous terms, with no additional constant or non-homogeneous part. 3. To solve such relations, we use the characteristic equation, which is derived by assuming a solution of the form $r^n$ and substituting into the recurrence. 4. The characteristic equation is a polynomial equation whose roots determine the form of the general solution. 5. The general solution is a linear combination of terms involving the roots of the characteristic equation, often expressed as exponential functions of $n$ (like $r^n$). 6. Constants appear as coefficients in the linear combination, but the key elements are the roots and exponential functions. 7. Logarithms are not generally involved in the solution of homogeneous linear recurrence relations. 8. Therefore, the correct answer is (a) Roots of the characteristic equation.