This sound effect (as the name suggests) originates from the famous 1993 film adaptation of "Jurassic Park". The sound effect (which was created by Gary Rydstrom and several other sound designers) was made using the roar of an elephant, the growling of a tiger and alligator and the sound of a whale blow (which was used for its breath). A dog attacking a rope toy was used for the sounds of the T-Rex tearing a Gallimimus apart, while cut sequoias crashing to the ground became the sound of the dinosaur's footsteps. Links: https://soundeffects.fandom.com/wiki/Jurassic_Park,_T-Rex_-_Attack_Roar/Audio_Samples