Yes, there will definitely be a time when we run out of fossil fuels to burn. It's often claimed that we have enough coal to last hundreds of years. But if we step up production to fill the gap left through depleting our oil and gas reserves, the coal deposits we know about will run out in 2088.
C. Neon is the element which is not likely to form bonds. This is because neon is a noble gas, which means that it already has the maximum of 8 valence electrons, and doesn't need more, whereas gold, oxygen, and mercury can bond more electrons.
Similars are they both contain all 4 biomolcules, have ribsomes, can be uniceullar, have cell membranes and cell wall, have DNA, and similar metabolism
