Final answer:
The two correctly punctuated parts of the passage are a) The sun sets in the west, bringing a peaceful end to the day, and c) Birds sing joyfully, heralding the arrival of a new morning.
Step-by-step explanation:
The student has asked which two parts of the passage are punctuated correctly. The correct answers are:
- a) The sun sets in the west, bringing a peaceful end to the day.
- c) Birds sing joyfully, heralding the arrival of a new morning.
Both of these options use commas correctly to separate clauses and to list descriptive details. Option b) incorrectly uses a semicolon instead of a comma, and option d) erroneously places a comma between the subject and the verb.