Some ways to stay safe using the internet are,
-putting blocks up
-staying away from sites with suspicious ads
-don’t talk to people you don’t know
-parents keeping a eye on their child’s websites
Good luck hun;)
The best test would be a BMI. Hydrostatic weighing would just find their weight and wouldn't tell the doctor anything about the specific amount of fat on the body. There is no such thing as an MRK, and the Caliper test is a personality test. I hope this helps!
Hemostatic drug
Antibiotics are used to treat an infection, so it wouldn’t be that one. Thrombolytic drugs are used to prevent blood clots, and they thin blood. So not that one. Coagulant drugs are used to thicken things, but this is a anticoagulant. Meaning it will thin it. I think the only logical answer would be hemostatic drug.