This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest. refrigating the food in the refrigator keeping them in air-tight boxes not keeping them in plastic as chemicals in the plastic can harm them.
4.if its for vegetables,fruits or salad  add vinegar in it and keep it covered