A man has an oak tree with dropping, discolored leaves, and poor growth. Which of the following professionals would be most likely to be able to tell him what is wrong with the tree? an arborist

a pomologist

a landscape designer

an agronomist

producers within ecosystems are essential as they are at the base of the food chain. plants are examples of producers. they use the process of photosynthesis to capture light energy and use it to convert simple inorganic substances (carbon dioxide and water) into organic substances (glucose).

the planets have a circular orbit around the sun.

nursery- first choice