The correct answer is B. Every family should buy local produce because it is more nutritious, it requires less packaging, and it promotes energy conservation.
Step-by-step explanation:
The science teacher assignment proposed focuses on suggesting one earth-friendly way or action every family should do to reduce their "ecological footprint" or simply called food print that is the number of resources taken from nature to support people lifestyle and the negative effects of it in the environment. In this way, what the teacher requires is students to suggest one of the ways to reduce the negative effect families have on the environment and that includes avoiding the use of a car, eating the local products, buying only what is necessary, among others. In the case of option B. "Every family should buy local produce because it is more nutritious, it requires less packaging, and it promotes energy conservation" it suggest a way to reduce the footprint as well as it suggests buying local products and with this there is a reduction in packaging and energy, which means fewer resources are taken from nature and less damage is done which is a reduction of the ecological footprint. Thus, this options answers to the requirements set by the teacher as it invites to take an action all families can easily do and that will reduce the footprint.