In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
How does a camel survive in the desert? Many people think that the camel stores water in its hump, but the hump is really made up of fats. When a camel (1)______ find water, it passes less urine to conserve (2)______ small amount of water it has in its body. Furthermore, the camel has a higher body temperature than (3)______ of most mammals. This means that it starts to sweat (4)_______ a higher temperature than that which human beings, for example, (5)_______ to perspire. This also helps it to keep water loss through sweating to a minimal.
Select the most appropriate option to fill in blank number 1.