Linked from
The 18 pages that link to Basal metabolic rate, each with the reason it gives.
EndothermyRelated: It reflects the baseline metabolic energy available for heat production.
CalorieRelated: Daily calorie needs depend partly on energy used at rest.
Food energyRelated: It is a major component of the energy needs that food must meet.
EndothermRelated: Its measurement helps compare the baseline energetic demands of endotherms.
Human nutritionRelated: It accounts for a substantial share of daily energy needs.