I'm quite puzzled by your question. Of course most food from these countries should be safe. People in India and Mexico eat it. I live in Canada and eat TONS of imported Mexican products and they are great.
The question, I think, relates to food safety standards. Usually if items are approved for import to North America they have to conform to some standards, but the truth is that food safety standards do vary from country to country. For example, one country might allow a lot more pesticide to be present in products than Another Country. It's pretty complicated, but just as a general rule, you aren't likely to get sick from a can of food from Mexico!
Mexico and India
it depends on which part of India
food
they eat popodoms
food
Yes, most Tinned/sealed food is safe to eat. The only time that it isn't safe to eat is if the "Use by date" has expired
What is the food that the shudras, from ancient India, eat.
No
very
No one answer, since there is more than one prison. In the US, generally yes. Not great food, but safe to eat.
Its 100% safe, but i don't think you should really eat dog food, its for dogs not humans...
The food in Greece is safe to eat. You do not need to bring any of your own food with you. The water should be safe to drink as well. Although a lot of tourists prefer to drink bottled water.