Mostly plants. It is regarded as a fact that gatherers were known for collecting roots, tubers, bulbs, fruits, berries, nuts, seeds, leafy greens, mushrooms, and herbs. It’s also prooven they also gathered honey, eggs, shellfish, insects, larvae, and other small, stationary food sources. Bigger hunts provided larger amounts of meat, but they were unpredictable. Gathering supplied a far more reliable, day-to-day source of calories and nutrients, and in many hunter-gatherer societies it contributed the majority of the regular food inta… This is Shitty ask Lemmy? I am sorry.

Calories. They gathered calories.

Square rocks for the pyramid.

Mostly the wild variants of the plants we still eat today.

I read a book about the native Americans in my area. I think it was called “the ohlone way” it was a few years ago so the details are fuzzy. But I think it said the hunters would spend days in like sweat houses, sweating, maybe they were taking mushrooms or smoking, I don’t remember. But their goals was to think like a deer (or whatever prey they wanted to hunt) which they believed would help them hunt their prey. They wanted to achieve pure deer mentality to achieve their hunt.

So everyone that wasn’t in the sweat hut had to go collect acorns and make acorn portage, which was quite labor intensive, and gather whatever other food, berries and shit, while these few hunter guys were tripping balls trying to channel pure deer mentality energy prior to hunting.

As mentioned in a sibling comment, whatever could be foraged in a given area. It probably wasn’t uncommon to move around with the seasons depending on what’s growing where. I’m far from an expert but I study a lot of history and take a keen interest in human evolution so I applaud the quest for knowledge in this area.