How did Greek trading ships differ from fighting ships? Trading ships used many more sails than fighting ships to ensure speed.
Trading ships were smaller because they traveled shorter distances.
Trading ships were larger because they carried supplies and goods.
Trading ships used three rows of oars for maneuvering.

food chain i would say only because there is competition on getting food and survival

"the sepoy rebellion was the result of many, many influences and stressors on the cultures of india living under british rule. in britain, it's called the sepoy mutiny on the indian mutiny, but in india, it's called the first war of independence.

the main reason is concerned to the british paramountcy , the belief in british   dominance in india political, economic and cultural life had been introduced in india about 1820."

"they were forced to grow crops that benefited the colonizing nations instead of feeding their own people."