Question

how can gastroenteritis be contracted?
not storing food properly
not washing hands well enough
not keeping food hot enough
not canning food properly

Explanation:

Gastroenteritis can be caused by ingesting contaminated food or coming into contact with pathogens. Improper food - storage can allow bacteria, viruses or parasites to grow in food. Poor hand - washing can lead to the transfer of these pathogens to the mouth. While not keeping food hot enough or not canning food properly are also food - safety issues, improper food storage and poor hand - washing are more common ways to contract gastroenteritis.

Answer:

not storing food properly, not washing hands well enough