What it is inside earth?

The core.

Explanation:

There is many layers going in the earth, but the main one as it's very first one is the core. hope this helped :) if not comment and I'll try to answer what your asking for!

answer; /// the above statement is (true);

the addition that would strengthen melissa’s thesis statement, both the dark game and the code book explain the importance of codebreaking, is :

main ideas of each book

melissa should discuss the main ideas of each book because these ideas will fully support her thesis statement. through these details, readers will also understand the importance of codebreaking that melissa referred to, which was inspired by the books.

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explanation: