Yes they are what are your options
Since plants are able to do Photosynthesis while animals are not, it would be the part of the plant that does it.
so the answer would be Chloroplast.
Coal will eventually run out as it is an non-renewable energy. these are when they cannot be reproduced to make more,unlike would as u can replant them to create trees
There are 115 known elements as of today (Feb. 13, 2016)
so, 'C' is the correct answer