In the 1990s and the first two decades of the 2000s, investors from the asian economies of japan and china made significant direct and portfolio investments in the united states. at the time, many americans were unhappy that this investment was occurring. o true o false it was better for the united states to receive this foreign investment because it would lead to faster economic growth. o true o false it's best for americans that china and japan, rather than americans themselves, made the investment because americans could receive the returns on the investment made by china and japan. o true o false

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.'