A planting trees around a farm
Explanation:
Trees majorly help us out, by converting carbon dioxide into oxygen. If you cut down trees that releases carbon dioxide out into the air.
The Right Answer Is Exoskeleton.
The correct answer is: marsupials.
Marsupials are actually defined by their ability to hold the young in the pouches, where they can be well protected. Some examples are Kangaroos and Koalas.
Other answers are wrong: for example, gymnosperms are plants, not animals.
