Final answer:
The Monsanto advertisement video focuses on the control and exploitation of agricultural markets through intellectual property rights.
Step-by-step explanation:
The underlying management theme from the Monsanto advertisement video is the control and exploitation of agricultural markets through intellectual property rights.
The video portrays how genetically engineered crops, which can be patented by companies like Monsanto, can potentially give them control over the seed market. This control can lead to monopolistic practices and the manipulation of prices, which is a major concern in the debate surrounding genetically engineered crops.