Here's why:
* Triple meter has three beats per measure.
* The first beat is considered the strongest beat and is where the accent naturally falls.
Example:
Imagine clapping to the beat of a waltz. You'll naturally clap stronger on the first beat of each measure.
Other considerations:
* While the first beat is the strongest, there can be variations in accents depending on the specific music.
* Some composers may choose to emphasize other beats within the measure for artistic effect.
Let me know if you have any more questions about music theory!