What symbol is featured in the U.S. Emblem adopted in 1776?

The correct answer features the eagle and shield, which hold significant historical and symbolic value in the context of the United States. The bald eagle, chosen for its majestic appearance and as a symbol of strength and freedom, was officially adopted as the national bird in 1782. The eagle represents the nation's ideals and independence, soaring high in the sky and embodying the spirit of the United States.

The shield beneath the eagle is designed to symbolize the defense of the country. It features a design of thirteen stripes that represent the original thirteen colonies, signifying unity and resilience. The eagle holds a banner in its beak with the motto "E pluribus unum," which translates to "Out of many, one," reinforcing the idea of coming together as a unified nation despite diverse backgrounds.

In contrast, the other options do not align with the symbols adopted in the U.S. Emblem. The flag and stars represent the American flag but are not depicted in the emblem itself. The heart and shield do not have any significant historical connection to the emblem. The tree and eagle mix symbols that do not accurately represent the designated national emblem. Thus, the eagle and shield appropriately encapsulate the values and aspirations of the United States as established in 1776.