Final answer:
The books Timothy co-wrote with Silvanus and Paul are 1 Thessalonians and 2 Thessalonians, which are part of the Pauline Epistles in the New Testament.
Step-by-step explanation:
The books that Timothy helped to write with Silvanus (Silas) and Paul are 1 Thessalonians and 2 Thessalonians. These epistles are grouped with the Pauline Epistles in the New Testament, and tradition has held that Timothy and Silvanus were co-senders of the letters, indicating their involvement and collaboration in the ministry and its correspondence.
1 Thessalonians and 2 Thessalonians address various issues concerning the Thessalonian church including encouragements in faith, explanations about the second coming of Christ, and exhortations to live a life of holiness and diligence. The correct answer to the question would therefore be: A) 1 Thessalonians and 2 Thessalonians.