The two main factors that determined the character of spartan society were

the conquest of Messenia and the enslavement of the Helots

Explanation:

the antiquated Greek city-province of Sparta had a social order that was not the same as a large number of its neighbors. The highest point of the social pyramid was possessed by the two rulers, whose forces were checked by a 'board of older folks'. These older folks were browsed the following class, the Spartiates. Underneath this blue-blooded class was a working class which was known as the Perioeci. The most minimal class, which was likewise the biggest, in Spartan culture was held a gathering known as the Helots. As indicated by the Greek geographer Pausanias, the Helots hailed from a city called Helos. This city is said to have been vanquished by the Spartans, and its tenants turned into their first slaves.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

your answer is "graduates" hope this