The relationship between the two would either be predator prey or parasite and host more likely then not though I would say it was predator and prey relationship the predatory species going extinct allowing the prey species to grow its population.
It’s competition I think since they were both against each other to gain energy for themselves and it caused the other species to die out so the gaining species can have more.
The answer you're looking for is Panda because a panda has an organ system, the other choices are all microscopic organisms so they don't have an organ system
Being raised in conditions of extreme deprivation is an environmental influence that has the clearest, most profound effect on intellectual development.
