Step 1: Concept Overview:
The question requires identifying the author from the list most associated with the Gothic literary tradition.
Step 2: Detailed Analysis:
Evaluating each author's literary connections:
\[\begin{array}{rl} \bullet & \text{Mary Shelley: Author of Frankenstein (1818), a foundational work of Gothic fiction and early science fiction. It features Gothic elements such as a dark atmosphere, boundary transgression, and themes of horror.} \\ \bullet & \text{Leo Tolstoy: A Russian Realist novelist, known for War and Peace and Anna Karenina.} \\ \bullet & \text{Ezra Pound: A key figure in Modernist poetry, known for Imagism and Vorticism.} \\ \bullet & \text{Chinua Achebe: A Nigerian novelist and a founder of modern African and Postcolonial literature, famous for Things Fall Apart.} \\ \end{array}\]Thus, Mary Shelley is the writer linked to the Gothic tradition.
Step 3: Conclusion:
The answer is (A).