Which site in particular allows its uses to form group of like-minded people who want to plan offline, real world meetings

answer; ///i do believe that the correct answer is (d) it provided irrigation for farming; ///

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'

a bag with lamp

explanation:

because when in dark, our handbag would be hard to find, so when we switch on the light using thw remote, the bag would be easy to find