Final answer:
Gastric cancer can be associated with factors such as Helicobacter pylori infection, consumption of processed meats containing nitrites, and poor diet and physical inactivity.
Step-by-step explanation:
Gastric cancer, also known as stomach cancer, can be associated with several factors. One major factor is Helicobacter pylori infection. This bacterium can tolerate the acidic environment of the stomach and is a known cause of stomach ulcers and an increased risk of stomach cancer. Another factor is the consumption of processed meats containing nitrites, which may play a role in increasing the risk of gastric cancer. Additionally, poor diet and physical inactivity contribute to high rates of obesity, which is responsible for at least a third of cancer deaths, including gastric cancer.