I think the answer is "physical"
hope this helps ! :D
Answer:
Universe: all of space and time (collectively referred to as spacetime) and their contents.
Solar System: gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly.
Galaxy: a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
Cluster: a group of stars formed closely
Constellation: a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
What would happen? The ecosystem would remain stable because the red-tailed hawk would be replaced by increasing populations of elf owls as apex consumers. Food web is the network of different food chains operate in any ecosystem. A food chains consists of producer and different consumers. Apex predators (top carnivores) are top consumers. In a given image of food web of a desert ecosystem, red-tailed hawks are an apex consumer. If red-tailed hawks are removed from the given food web, the populations of elf owls will increase due to unavailable their predator and elf owls will become apex consumers and the ecosystem would remain stable.
