Chloroplasts are the site of and are located in plants and plantlike organisms called

Photosynthesis; primary producers

Explanation:

Chloroplasts are the site of PHOTOSYNTHESIS and are located in plants and plantlike organisms called PRIMARY PRODUCERS.

Due to the presence of green coloured pigment, chlorophyll in the chloroplasts of plants, they are able to trap Sun energy in the presence of carbon dioxide and water to produce sugar molecules.

This ability makes plants and plantlike organisms containing chloroplast PRIMARY PRODUCERS, as they are the main producers of food and energy to the other organisms in the food chain.

photosyntheisis and primary producers e.g Algae

Explanation: The process of photosynthesis takes place in the chloroplast.

Chloroplast absorb sunlight needed for the conversation of carbondioxide(CO2) and H20 to form sugar and oxygen needed by green plant called producers. Other than plant some plant like organism such as Algae are plant like organism they have ability to produce their own food through the presence of chloroplast in them.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

(nitrogen fixation) will be your answer sorry if im wrong