Greek yogurt is yogurt that has been strained to remove its whey, resulting in a thicker consistency than that of unstrained yogurt, while preserving yogurt's distinctive sour taste.
The answer is A, the immune system
After reading the following options, the correct one is the third option, PET scans will use tracers to inject in a vein in someone's arm. Then, the organs as well as tissues will absorb the tracer. This information makes the third option correct because PET scans mostly work with your tissues to see if there are any diseases someone may have in their body.
Hope I helped! :)
Peaculiar
If someone says do 5 reps of 20 push-ups yo do 20 push-ups then take a little break and do that 5 times