Which level of a food pyramid represents the largest amount of organisms

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

Your two friends just told you what to order for them at the drive through fast food restaurant. you give the order but when the food comes about 10 minutes later, you don't remember what each of your friends ordered your memory of the order was in __ memory. a. semantic b. flashbulb c. long-term d. short-term i think i know but i'm not really sure

What is any method of measuring the age of an object or event in years, such as using atomic half-life?