What is the correct definition of frequency with regards to physical fitness

Frequency is how often you exercise. Usually we measure this by number of days each week. Intensity is how hard your exercise. ... Type refers to what kind of exercise you are doing. For example, you might do cardiovascular activity (also known simply as 'cardio'), strength training, or a combination of the two.

Explanation:

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.