The best method of developing a paragraph about a landscape would be
chronological
spatial
particular
contrast

I believe the answer would be spatial. You are describing a landscape, so you want to describe it visually. Therefore, you would not need to use chronological information (a list of events in the manner in which they occurred). You would also not need to use contrasting information, as you are not comparing two landscapes, you are simply describing one. You would probably indicate how large the landscape is, the distance between the trees and other elements in the environment, et cetera. This is all spatial information. Hope this helps. 

The answer is a) carbon-12

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.