MODELS OF PLANET-FORMING DISKS INDICATE THAT PROCESSES SUCH AS DUST GRAIN ORBITAL MIGRATION AND SEGREGATION THE FORMATION OF GRAIN ICE MANTLES IRRADIATION-INDUCED EVOLUTION OF GAS-PHASE MOLECULAR ABUNDANCES AND DISK GAS DISPERSAL TOGETHER LIKELY REGULATE THE RATE OF PLANETESIMAL BUILDUP AND THE EVENTUAL COMPOSITIONS OF BODIES RANGING FROM COMETS TO GIANT PLANET ENVELOPES. KEY ASPECTS OF SUCH MODEL PREDICTIONS CAN NOW BE TESTED DIRECTLY VIA SUITES OF MULTIWAVELENGTH SUBARCSECOND-RESOLUTION OBSERVATIONS OBTAINED WITH THE LATEST GENERATION OF GROUND-BASED FACILITIES. FURTHER GROUNDBREAKING DISCOVERIES IN THE STUDY OF NEWBORN EXOPLANETS AND THEIR BIRTHPLACES ARE MOST LIKELY TO EMERGE FROM STUDIES OF THOSE YOUNG (AGE<30 MYR) STARS THAT ARE NEAREST EARTH. WE SEEK TO ADVANCE OUR UNDERSTANDING OF THE ORIGINS OF EXOPLANETS BY CONTINUING OUR PROGRAM OF MULTIWAVELENGTH OBSERVATIONS AND ASSOCIATED MODELING TARGETING THE RARE EXAMPLES OF YOUNG STARS WITHIN ~100 PC THAT ARE ORBITED BY AND ARE ACTIVELY ACCRETING FROM GAS-RICH PROTOPLANETARY DISKS.