Answer: A, by drinking and eating other living things
Step-by-step explanation:
B would not be correct because though there is water gained when eating plants, sweating is the loss of water.
C is not correct because though animals do get water from drinking, animals do not perform photosynthesis
D is not correct because though animals can get water from their environment when it rains (through drinking) evaporation is the removal of water.
A is the correct answer