6. Stethoscope is to doctor as chalk is to 7 Coronavirus is to as Taal Volcano eruption is to disaster & Tired is to sleep as is to eat. is to chicken as African Swine taver is to pig 10 Facemask is to protect as alcohol is to 11. Marathon is to race as hibernation is to 12. Optimist is too cheerful as is to gloomy 13 Clock is to as thermometer is to temperature 14 is to actor as concert is to musician 15 Studying is to as watching is to entertain​