What time signature features two half notes per bar?

The time signature that features two half notes per bar is represented by 2/2 time. In this time signature, the top number indicates that there are two beats in each measure, and each beat is a half note. Therefore, a measure of 2/2 time would consist of exactly two half notes, allowing for a straightforward rhythmic structure that is conducive for conducting or performing in a fluid, flowing style.

In contrast, the other time signatures mentioned have different qualities: 3/4 time has three beats per measure with each beat being a quarter note, 4/4 time has four beats per measure with each beat being a quarter note, and 6/8 time typically has six beats per measure with each beat being an eighth note, emphasizing a compound feel rather than the simple division found in 2/2 time. Thus, 2/2 time is specifically designed to encompass two half notes in each bar, making it the correct answer.