The answer is B, a thin layer.
It is a good advantage because they will immediately know how to survive and take care of themselves. Innate behaviors are behaviors that animals exhibit that they did not learn. For example, baby monkeys and apes (including humans) will grasp things with their feet and/or hands. Nobody has to teach them to do this, they are just born knowing how to do it. It is most definitely an advantage.
Flowers and weeds are in common in many ways such as they grow from the ground. Also they similar to garden plants, weeds can produce colorful flowers and attract beneficial insects, like bees and butterflies, to the yard. ... A field of blooming wild spring flowers and weeds.Weeds and flowers both grow in the soil and require water, sunlight, and proper nutrients in order to survive.