In DNA, Adenine (A) always pairs with Thymine (T). Therefore, the correct response for your statement is Thymine (T).
Let me summarize the base pairing rules for DNA:
- Adenine (A) pairs with Thymine (T)
- Cytosine (C) pairs with Guanine (G)
So, fill in the response area with Thymine (T) for Adenine (A).