Unlike light sound cannot travel through a vaccum. An example of a vacum is outer space. You can see lights from space, but can not hear sounds from space
There could be many answers to this question, but a possible one is embryo!!
In multicellular organisms individual cells grow and then divide via a process called mitosis, thereby allowing the organism to grow. Cellular division and differentiation produce and maintain a complex organism, composed of systems of tissues and organs that work together to meet the needs of the whole organism.
Answer:
C.emigration is the answer......
