Psychodynamic therapies may not be very effective in the treatment of substance-related disorders because:

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

because the light is a great source of energy for the plants to survive. (i hope this )