In what way does living on land present a challenge to terrestrial animals

For terrestrial animals, living on land presents the following challenges:

Explanation

Terrestrial animals are animals that live mostly or entirely on land, as compared with aquatic animals, which live predominantly or entirely in the water, or amphibians, which rely on a combination of aquatic and terrestrial habitats.

The theory of evolution suggests that terrestrial animals evolved from aquatic animals. So, the transition from aquatic to terrestrial habitats was a formative event in vertebrate evolution because it led to a sudden emergence of species as new land animals which diversified in response to new physical and biological conditions which now required that they move, feed, respire and reproduce differently.

Scientists state that the lobe-finned fish and amphibians move onto land and live in water and that this amphibious habit requires their body systems to function in both environment. This requirement presents a plausible explanation to how their bodies gradually evolved to live on land.

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true is the answer : )

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.