Which of the following discoveries happened most recently?

first type of contact lens
first open heart surgery
laser eye surgery
measles vaccine

Many 1. why should teens be aware of health issues such as healthy sexuality, dealing with conflict, healthy decision making and cpr? 2. explain why in the gym these following rules are very importanta. wearing the proper outfit/equipmentb. make sure people around you are aware c. check for hazardsd. make sure all the equipment is set up properly e.make sure to know where the nearest first aid kit/aed is3. pick a sport out of the following and volleyball, basketball, soccer, ringette, badminton.a) what are the 3 most important aspects/skills to learn in order to perform this activity well? b) explain how each aspect/skill is important when playing the game.c) describe 2 points of strategy you could use to you be successful at this activity.