Organisms in the lowest trophic level of an ecosystem are always

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )