#whichImgFrame{
  position:relative;
  width:100%;
  height:50vh;
  margin: 15px 0 10px;
}
#whichImgFrame img{
  position:absolute;
  left:0;
  top:0;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  display: none;
}
@media (max-width: 1200px) {
  #whichImgFrame {
    position: relative;
    width: 100%;
    height: 43vh;
    margin: 15px 0 67px;
  }
}
@media (max-width: 900px){}
@media (max-width: 760px) {
  #whichImgFrame {
    width: 100%;
    height: 36vh;
    margin: 13px 0;
  }
}