The subordinate clause here is A, "as the layers of ash slowly compressed". Subordinate means that it cannot exist on its own, it has to be a part of the main, independent clause.
Answer:
b. exploration was important in the fifteenth century
Explanation:
just took the quiz on edge 2020 just trust me bro
Answer: are there any answer choices for me to pick
Explanation:
The first sentence has the pronoun reference error. it sounds like AL is scratching not the dog. the error is using "he" just eliminate the word.
