Final answer:
The part of speech that explains the relationship between ideas is conjunctions. Conjunctions join words, phrases, or clauses together.
Step-by-step explanation:
The part of speech that explains the relationship between ideas is conjunctions. Conjunctions are words that join words, phrases, or clauses together. They allow for the smooth flow of ideas and help to express logical relationships.
For example, in the sentence "I like both coffee and tea", the conjunction 'and' is used to connect and show the relationship between the two ideas of liking coffee and liking tea.
Other examples of conjunctions include 'but', 'or', 'nor', 'yet', 'so', and 'for'.
Learn more about Part of speech