Answer:
A. prevention of further erosion
I hope this is the correct answer
Methane in fuel cells are not burned and therefore, help to reduce pollutants commonly associated with fossil fuel combustion.
<h3>What are fossil fuels?</h3>
Fossils fuels are fuels wgich are produced from fossils which have decomposed under intense heat and pressure over a long period of time.
Fossils fuels include:
- methane
- petrol
- kerosene
- diesel oil
- coal
Fossils fuels combustion release pollutants into the atmosphere and have greatly contributed to global warming.
Since methane in fuel cells are not burned, it will help to reduce pollutants commonly associated with fossil fuel combustion.
Learn more about fossil fuels at: brainly.com/question/79954
Answer: (a) BE = 1.112 MeV
(b) BE = 7.074 MeV
(c) BE = 7.767 MeV
(d) BE = 8.112 MeV
Explanation: Binding energy per nucleon is the average energy necessary to remove a proton or a neutron from the nucleus of an atom. It is mathematically defined as:

Where
Δm is a difference in mass known as <u><em>mass</em></u><em> </em><u><em>defect</em></u>
A is atomic mass of an atom.
Mass Defect is determined by:

where:
Z is atomic number
is mass of proton
is mass of neutron
is mass of the nucleus
Mass of proton is 1.007825u.
Mass of neutron is 1.008665u.
The unit u is equal to 931.5MeV/c².
(a) 2H(deuterion): Given: Z = 1; A = 2;
= 2.014102u



BE = 1.112MeV
(b) 4He (Helium): Given: Z = 2; A = 4;
= 4.002603



BE = 7.074MeV
(c) 18O (Oxygen): Given: Z = 8; A = 18;
= 17.999160



BE = 7.767MeV
(d) 23Na (Sodium): Given: Z = 11; A = 23;
= 22.989767



BE = 8.112MeV