25. The Grana Weightloss System advertises its exercise machines on late-night TV. Their advertisements are typically half and hour long, and feature spokespeople as well as consumers and celebrities talking about their experiences with the brand. In this scenario, the company is using .

infomercials

Explanation: Infomercials are long commercial segments, offering consumer information related to a sponsor's product or service.

its high unemployment figures

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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.'