In the Paleolithic era Homo Habilis' only knew how to use weapons that were made out of stone to hunt with. They used them to hunt birds and wild animals like bison and goat. These Homo Habilis brought back their live stock to their caves and would cook them on controlled fire.
Homo Habilis' hunted and gathered their food by hand if they didn't have any stone weapons. If meat was hard to come by the next resort was to eat nuts, fruit and berries.
Moving on to the 'middle' aka the Mesolithic era, this is where Homo Habilis became Homo Erectus and Homo Erectus learned how to control fire. Along with how to make spears out of used bones. The tent depicted in the back would be made out of leaves or animal skin.
The art of fishing began after the last ice sheet over Great Britain melted and large areas of vegetation and woodland started growing. Though, this happened humans were still nomadic. This is why in the picture above these Homo Erectus are fishing out of a canoe and collecting bones to find food.
Going into the last era of the Stone Age; the Neolithic era also known as the 'New Stone Age' the Earth is starting to warm up and Homo Erectus evolved into Homo Sapiens. With all the vegetation that started to grow in the previous era Homo Sapiens learned to farm, which strayed them away from the nomadic lifestyle. Farming becoming so common started a trend of agriculture that further lead to domestication.
With farming becoming the way Homo Sapiens ate farmers commonly made a 'surplus of food' to make sure everyone was fed. Doing this led to rules being made to keep peace between all of the people who started to settle and create a civilization. Since farmers were making so much food there wasn't a need for a lot of them, this lead to the rest of the Homo Sapiens to specialize in other arts. Such as. figurines and jewelry. Much of which is now used by Archaeologist and Anthropologists in 21st Century research.