True, sites such as kickstarter and just giving are fantastic examples of such.
Answer:d) Mono-alphabetic substitution rules
Explanation: Poly-alphabetic cipher is the cryptography that is done by using the many alphabets in substitutional way. They are supposed to have a good security because they use cipher text alphabets for the encryption and then decrypts it.
Substitution of the alphabets is done by the rule of the mono-alphabetic substitution rules.Other given options are incorrect because they are not used in the cryptography of the alphabetic cipher. Thus option (d) is the correct answer.
The correct answer is letter b
Answer:
chemistry is very important because everything you do is chemistry . our body is made up of chemicals . chemicals reactions occurs when be breathe ,eat , etc . All matter is made of chemicals so that chemistry is very important in our life
