High-density means full and low density is more empty
A mystery organism is non living
The answer is: c because the rate that these consumers convert the chemical energy to their food into their own biomass
Exploring the city with trolley cars and many hills. This city is San Francisco, CA.
Trolley cars or cable cars were introduced in 1873 to enable locals to contend with many hills the city is built on. Now, tourists ride the cable cars and will be given a tour of the city.