Which is the first medication approved to reduce the risk of human immunodeficiency virus (hiv) infection in unaffected individuals?

Food and Drug Administration (FDA) of United States, has approved Truvada (tenofovir disoproxil fumarate), the first drug which reduce the risk of HIV infection in uninfected individuals who may engage in sexual activity with HIV-infected partners. They are at high risk of HIV infection. Truvada is taken daily as a pre-exposure prophylaxis measure, in combination with safer sex practices to reduce the risk of sexually-acquired HIV infection in adults at high risk.

i would say d

explanation:

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg