It would adapt by eating the seaweed as food and living near moist places.
An iguana is a type of lizard.
There is no pronoun that means 'abundant source'. Some nouns that mean 'abundant source' are mine or well. Some adjectives that mean 'abundant source' are much and rife.
The most abundant source would be in glacial form as frozen water, although the most abundant and accessible source is groundwater.
Now Romania hasn't an abundant source of energy.
Seaweed / kelp.
Coal is the most abundant in the USA
Romania has energy resources but not so abundant.
Solar.
It is renewable energy source (i.e. non exhaustible). It is clean energy source (i.e. not polluting environment). However, its use has limitations of availability of sites with efficient wind speeds and not heavily populated.
coal
The sun
Solar.