Pictured here is the nitrogen cycle. The organisms that are responsible for
nitrification are most likely...

Option A, Bacteria

Explanation:

Nitrifying bacteria is a group of aerobic bacteria that converts ammonia in soil into nitrates so that it can be easily taken up by the plants. So basically, in this entire conversion bacteria’s of two distinct group are used – a) bacteria that convert ammonia to nitrites (such as Nitrosomonas, Nitrosospira, Nitrosococcus, and Nitrosolobus ); and b) bacteria that converts nitrites to nitrates

Hence, option A is correct

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt