Why were tool-making and language important for the development of human culture?

Both tools and language were very important for our survival, as well as the development of our culture. Tools enabled humans to hunt animals. Those animals served as food, and sometimes their hides were used for creating shelters and, later on, clothing. This shows a small part of our culture. What we eat and drink today depends on which part of the world we come from, how financially stable we are, what religion we follow, etc. Back then, the humans' diet depended on which part of the world they lived in, and what kind of hunting tools they were able to make. Human culture started developing even three million years ago! Tools were also used for making fire. With fire, early humans could stay up later at night, and socialize with friends and family. This started oral tradition another very important part of our culture. Oral tradition tells us about the hopes, dreams, ideas and opinions of the people who lived long ago. Fire also enabled the early humans to migrate to colder areas, and spread around the world. Language has helped early humans a lot. More complex words, and short sentences gave them the opportunity to discuss hunting techniques, and improve their tool-making. With language oral tradition started, and, over time, with the humans' brains evolving and becoming more developed, humans started telling more detailed stories of their beliefs and lifestyle. Language also enabled humans to do many other things. They could choose leaders, to make changes and lead the people in their communities. They could also discuss their religion, and what they believed in. Early humans could also talk about what they hoped to achieve in the future, and how they planned to survive.