What should I know about ‘basal metabolic rate’ and ‘average energy expenditure’?

What should I know about basal metabolic rate and average energy expenditure? So all of us are like machines, we're constantly burning calories to exist. And even though I'm sitting here right now speaking to you, I am burning calories. And that is what my basal metabolic rate is. And to a great extent it determines how many calories my body burns. In addition to this, I also have the energy that I burn when I exercise or when I walk, so that's called activity-based energy expenditure. And also you have another way of burning calories which is called diet-induced thermogenesis. Every time you eat food, as your intestines are contracting and absorbing the calories, that in itself burns more calories. you