The correct option is 1, 2, and 4 only, as these aspects represent significant applications of genetic engineering in agriculture that align with sustainability and food security. Genetically engineered plants designed for drought resistance help mitigate the impacts of climate change on crop yields, while enhancing nutritive value addresses malnutrition in populations that rely on staple crops. Increasing shelf life reduces food waste, promoting more efficient food distribution. In contrast, developing plants that can photosynthesize in spaceships is more experimental and not widely pursued as a priority in current genetic engineering efforts.