Which of the following terms DOES NOT fit and why? Rift-valley
Mid-ocean Ridge
Divergent boundary
Deep-ocean trench

Although i don't know what is the simulated system, starfish are predators that eat mostly  microalgae,  snails, sponges, bivalves, mussels and other small marine animals. removing starfish from any system would definitely increase this animals that they prey.

Obtaining enough restrationale: as the blood volume doubles during pregnancy, heart failure can occur. the pregnant woman needs to obtain adequate rest to prevent overworking the heart. fluid may need to be restricted.

Answermeter;

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