Which of the following describes an appropriate intervention for a fetus showing signs of distress in utero?

Performing a non-stress test is an appropriate intervention for a fetus showing signs of distress in utero because this test monitors the fetal heart rate in response to movements, helping to assess fetal well-being and identify any potential distress or compromised oxygenation. By evaluating the heart rate patterns, healthcare providers can determine whether the fetus is responding adequately to intrauterine conditions and make informed decisions regarding further management and interventions based on the test results.

In contrast, increasing maternal activity level could further stress the fetus and is not advisable in cases of distress. Settling the patient in a supine position might restrict venous return, particularly in late pregnancy, potentially exacerbating fetal distress due to reduced blood flow. Encouraging fluid intake, while generally beneficial, does not specifically address fetal distress and may not provide immediate actionable insights or protection for the fetus at that moment.