Evidence suggests that homo erectus obtained food mainly through:
a. domesticating animals (such as cows, pigs, and chickens)
b. domestication of plants (from wild plants to harvested plants, such as corn)
c. scavenging of dead animals and gathering of plants(just as homo habilis had done), and perhaps the hunting of smaller animals
d. primarily fishing in fresh water (streams and lakes)
e. all of the above, each in a different location of the world

C. Scavenging of dead animals and gathering of plants (just as Homo habilis had done), and perhaps the hunting of smaller animals

Explanation:

Homo erectus (erect man): Homo erectus is believed to be appeared about 1.5 million years ago. It was in the middle Pleistocene age when they evolved from homo habilis. Homo erectus probably ate meat, was around 1.5-1.8 meters tall and males were probably larger than females. As the name suggests they has erect posture. His skull was flatter than that of modern man and he had protruding jaws. Other features includes projecting brow ridges, small canines and large molar teeth. Their cranial capacity was 900 cc. Cranium was dome shaped to accommodate the large brain. Homo erectus was omnivorous and he made various tools using stones and bones. He made use of fire for hunting, defense and cooking. Homo erectus inculdes three fossils: Java Ape-man, Peking man and Heidelberg man.