Since there are no options listed to choose from, my best guess would be watches, since a lot of apple watch products are now sold with built in heart monitors.
where's the choices?
Please make sure to input complete
Uh to ask questions!
When you ask questions about the text it makes you think about it. The more you think, the more you learn:)
Thats why in public schools teachers always ask questions during the lesson to make sure kids are following along and thinking about the curriculum:)
hope this answer helps
and dont forget to
MARK ME BRAINLIEST! :D