To obtain a correct exposure, the right amount of light must arrive at a certain time, based on its sensitivity to light. The three factors can be combined with each other as long as the amount of light reaching the sensor is the same.
If you wanted to increase ISO sensitivity, you would be forced to compensate for this with one of the two solutions. Close the diaphragm (we find the word closed right next to the corner). Use a faster shutter speed (indicated in green). If instead you wanted to reduce the ISO sensitivity, you would be forced to do one of these two things as shown in South West Photography.
These considerations must also be made for shutter speeds and for the diaphragm. You may be wondering: but all these terms and directions where you find them on my new camera? Experts advise you to read all the manual of your body before starting.