Which of the following are basic components of a sine wave oscillator?

An oscillator is essentially an electronic circuit that generates a continuous, repeating waveform without requiring an external input signal. The most basic way to achieve this is by combining an amplifier with a frequency-determining component, such as a tuned filter. To sustain oscillation, a portion of the amplifier's output must be routed back to its input in phase. This is known as a positive feedback loop. The filter ensures that only the desired specific frequency is fed back and amplified, allowing the circuit to build and maintain a smooth sine wave. Options that mention dividers, frequency multipliers, or feed-forward loops are incorrect because they describe entirely different RF processes (such as frequency synthesis) rather than the foundational regenerative feedback loop required to create an oscillation.