1) If you are the one who get the highest score in an exam, what will people call you? And if you come second in the race, what will they call you?
2) It is a sea creature which looks like a crab but smaller, not too much smaller.
And another sea creature which also looks like a crab but much more smaller (am I right to add "more" here?) and its skin is pale (white),
Please help me asap
If you are the one who get the highest score in an exam, what will people call you?
I think there should be one. For instance, he is the one who got the best score on the entrance exam to XYZ University, and the University rewarded him later
Achieving highest score in an entrance examination is rewarded by confirmed acceptance into the university. Possibly the person might be awarded a scholarship. There seems no need for a term for someone who has highest marks is something. It is enough to say they have the top result.
A top scholar? Top achiever? Top performer? Top student?
...And there are a few special words - really code words - not known to most native speakers. For example, the student at Cambridge (the one in England) who gets top marks in mathematics is 'the Senior Wrangler'. But this is of very limited usage - except among fans of Terry Pratchett - and no use for [almost?] all English learners.