Question

The colonization of land by animals: took place billions of years ago.was made easier by high atmospheric levels of carbon dioxide.preceded the presence of plant species on land.may have taken place independently by a variety of species descended from aquatic ancestors.

Answer 1

Answer: the correct answer may have taken place independently by a variety os species descended from aquatic ancestors.

Step-by-step explanation:

Scientists think that life started in the oceans as early as 4 to 4.2 billion years ago.