The civilization that traded with India during the 1400s is the Swahili Coast. The Swahili city-states along the East African coast were important trading hubs that engaged in commerce with various regions, including India, particularly in spices, textiles, and other goods.
The other options, such as the United States and the Axum Empire, did not have significant trade interactions with India during that time period, and Britain became more involved in Indian trade later in the 16th century and onwards.