Complete the text with suitable prepositions.
Camels are one of the few animals that can live in a desert. Camels have humps (a) ______ their backs. They store fat (b) ______ these humps. The fat gives them energy. Because camels do not store water, fat helps produce water when camels move (c) ______ the dry desert. They can go (d) ______ several months without water. Camels eat grass to get moisture. The camels are as useful (e) ______ the people of the desert as the buffalo are (f) ______ the grasslands. The meat of the camel is good to eat. People make cloth (g) ______ of camel hair. Shoes are made (h) ______ the hides. The camels are also good (i) ______ travel in the desert. Some people travel the desert (j) ______ camels to make a living.