Technology is the human practise of using knowledge to intervene in the world, in order to satisfy needs and sieze opportunities. Technology doesn't always use tools. Often it uses systems.
Many of the things we take for granted are the result of the application of technology. Here are three basic, aparently natural phenomena that technology helps us use;
Water - whether it is a man made track to a natural stream, or a complicated system of reservoirs, pumps, pipes and taps, technology has played a part. Swimming, since it is not instinctive but must be learned, is arguably a form of technology (and in this case, it addresses the need to cross water without suffering death by drowning).
Food - whether it is an oral tradition about which plants and animals are safe to eat, where to find them and how to prepare them, or modern industrialised agriculture, technology is undoubtedly involved. Cooking is a form of technology.
Air - whether its movement is used to fill the sails of ancient boats, or used to power the blades of wind turbine electrical generators, technology has played a role.
Systems are invented, but tools aren't always made. In the same way that a found object like a stick can become a weapon or a digging tool, a found cave can become a house.