The correct option is this: IT IS ONLY USEFUL FOR MONITORING ORGANISMS THAT ARE FIXED IN ONE PLACE. Point count method of population monitoring involves standing in a specific location and counting a population of animals, usually birds. The number of birds or the specie of bird within a circle of a specific radius is counted. The radius is usually made as big as possible in order to maximize information gathering. This type of population monitoring method can only be used for animals that have fixed location, for instance, birds living in a particular ecosystem.
<span>Carbon is the only element that can form many different compounds. Each carbon atom can form four chemical bonds to other atoms. This allows it to form rings and chains.</span>
