Ram is like a computer’s while a hard drive is like a computer’s

RAM is like a computer's Heart while a hard drive is like a computer's Brain

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.

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.