I forged my way onto the survey, up to the sole question about gardening, and then exited.

The survey focuses more on commercially prepared food items rather than fresh produce, although many of the questioned foods could be prepared from frozen or canned home produce.
There would be no way to quantify the use of home-grown ingredients from the survey answers.

The participant is asked to think about their diet over the past one month. The past month is not when many people's diets have been amended from their home garden.

At our home, we have been occasionally using hot and bell peppers, beans, and beets preserved from last year's garden, but they are not a significant portion of our diet. Our freezer mostly contains home-grown fruits.

I hope the student will let us know the results of the survey.