DENDROLOGY

Detailed explanation-1: -Hint: Walnut are healthier they are tree nuts not dried fruit. Outer part of the walnut is hard which is not edible but the inner part is the edible part as it consists of seeds inside it.

Detailed explanation-2: -Pecans are smaller, sweeter, and cheaper than walnuts, with a higher degree of fiber, monounsaturated fat, and vitamin E. Walnuts are larger, more textured, and more expensive than pecans. They reign supreme in protein content, most micronutrients, and polyunsaturated content.