Based on the cycle of photosynthesis and cellular respiration, one can say that the ultimate original source of energy for all living things on earth is

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

i do believe the correct answer would be the third one. location c, because earth is tilted away from the sun at this time

hope this