Which of the following is the best method to estimate a 1-oz. serving size of nuts?

One handful.

Explanation:

Nuts may be defined as the fruits consisting of the the hard nut shell and dry edible fruits. Nuts provide high nutritious diet and are important for maintaining the patient's health.

The nuts must be given in the proper quantity and quality. The serving of the nuts might also depend on the person's health and their physiology. The estimated average size of the nuts used is one handful. The one handful method is best for nuts serving size.

Thus, the answer is one handful.