What was the strategic significance of capturing Iwo Jima during World War II?

Capturing Iwo Jima had a crucial strategic significance because it provided a base for launching air attacks on Japan. The island's location, situated roughly halfway between Japan and US military bases in the Mariana Islands, made it an ideal staging ground for B-29 bombers. With Iwo Jima secured, these bombers could operate more effectively and conduct frequent aerial missions, which included bombing runs over the Japanese mainland. This significantly enhanced the Allied air campaign, contributing to the overall strategy of weakening Japan's war capabilities and preparing for potential invasion.

The other choices do not reflect the primary strategic objectives associated with Iwo Jima. While it may have had some features that could support logistics or communications, the main focus for capturing the island was its role in the air offensive against Japan.