¿a qué hora abrió el banco el día que llegaste? a. abrió a la comisaría. b. no estoy seguro

answer is a: las

explanation:

the reason for this answer is becouse it's a plural frase which talks more then one thing

when the outside temperature is too cold, an endothermic animal can generate heat by shivering. endothermic animals must eat much more often than ectothermic animals since it takes energy to maintain a constant body temperature.