The uncertainty in the highlighted text arises when the jewelry represents multiple meanings for the girl. She crafts pieces with messages in Morse code from her father, and this bracelet holds extra significance as it contains his final message.
The accurate answer is as follows.
The appropriate locations are:
The Maya were responsible for the establishment of Chichen Itza.
The Maya created calendar systems still in use today.
The Inca constructed rope bridges.
The Maya thrived as a significant civilization in the Yucatán Peninsula of Mexico and portions of Guatemala and Belize. They established Chichen Itza, home to the remarkable Pyramid known as "the Castle" and an astronomical observatory, as the Maya excelled in Astronomy and developed the Maya Calendar referred to as the "Tzolkin," which remains relevant today.
The Incas were the prominent pre-Hispanic civilization in South America, having built the monumental Machu Picchu in Peru.