Which statements describe ecosystems?

Balance is required for the survival of an ecosystem.

Healthy ecosystems can support an unlimited number of plant and animal species.

One way to determine an ecosystem's health is by its biodiversity.

The parts of an ecosystem are independent and have little to do with each other.

People's actions sometimes improve the health of an ecosystem.

Predators play a role in balancing the earth's ecosystems.

answer: option d : 3.85 units

step-by-step explanation: in the given figure the blue line is diameter   .the diameter is the blue line which equals 7.7 units.radius is half of diameter .radius = 7.7÷2=3.85 units.

option d is the right answer.

explanation:

mark brainliest and have a great dayz1

not completely sure but i think it’s many moons, smaller in size and a ring system.