PLZ HELP 50 PIONT The Great Lakes region has both biotic and abiotic components.

Abiotic components include water, temperature, rainfall, and geological features. Biotic components include all of the animal and plant species in the area.

The ecosystem of the Great Lakes includes .

a

all of the biotic and abiotic components of the Great Lakes region

b

only the plant and animal species that live in the Great Lakes region

c

only the abiotic components of the Great Lakes region

d

only the animal species that live in the Great Lakes region

i think it is "A" not sure

Explanation:

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.