Complex sentence: Branson has been criticised by the Whale and Dolphin Conservation organisation for profiting from selling trips to SeaWorld and similar themed parks that hold dolphins, whales and other sea life in captivity for entertainment purposes.
Split into simpler sentences: Branson has been criticised by the Whale and Dolphin Conservation organization. It argues that Branson is profiting from selling trips to SeaWorld and similar themed parks that hold dolphins, whales and other sea life in captivity for entertainment purposes.