JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div>Flower</div>
  <div>Tree</div>
  <div>
    <div>Flower</div>
    <div>Bee</div>
  </div>
</div>

CSS

.container {
  display: flex;
}
.container > div {
  width: 50%;
}
.container div:nth-child(-n+2) {
  border: dashed;
  padding: 10px;
}
.container > div:nth-child(1) {
  display: none;                                  /*  hide outer "Flower"  */
}

@media (max-width:768px) {
  .container {
    flex-direction: column;
  }
  .container div {
    width: auto;
  }
 .container div:nth-child(1) {
    display: block;                               /*  show outer "Flower"  */
  }
  .container div:nth-child(3) div:nth-child(1) {
    display: none;                                /*  hide inner "Flower"  */
  }
}