Answer:
RAM is like a computer's Heart while a hard drive is like a computer's Brain
Step-by-step explanation:
RAM ( random access memory ) is temporary storage of computer data it holds a data while the computer is processing it and this data that is been held in the RAM is lost once the power source goes off. the ram helps to determine how fast your system performs hence it is likened to be the heart of a system.
Hard drive/Hard disk is the permanent storage device for the storage of Data for a very long period of time unless the data stored is changed by the user. the size of the a hard disk doesn't determine the performance speed of the system hence it is likened to be the Brain of the computer because the Brain stores processed information/data.