Step 1: The question asks to identify the source poem of the given line.
Step 2: The line describes the gentle, untroubled passage of time.
Step 3: This line is a direct quote from Alexander Pope's "Ode on Solitude." It describes the life of the happy, content man who lives simply on his own land. For him, time passes gently and peacefully, unmarked by the anxiety and ambition of the outside world. The marked answer (B) is incorrect.