and the second one?
It is a grammatically simplified means of communication  between two or more groups that do not have a  common language
Pidgin
A pidgin , or pidgin language, is a grammatically simplified means of communication that develops between two or more groups that do not have a language in common: typically, its vocabulary and grammar are limited and often drawn from several languages
ways in which infants learn the meanings of new words Infants must be able to hear and play with sounds in their environment, and to break up various phonetic units to discover words and their related meanings. at what age do they start speaking? At one year how do they develop their oral languages? Perception of speech, observe the mouth movements of others , discriminate sound phonologically what will be their first choice of words? "No" and "dada" when does babbling occur? It begins between five and seven months of age what is manual babbling? It is when infants babble with their hands and grow up using sign language how does this occur in deaf infants? Manual babbles are characterized by repetitive movements that are confined to a limited area in front of the body similar to the sign-phonetic space used in sign languages what is vocabulary spurt? UNANSWERABLE when did the sign language develop? Fifth Century BC what is its relationship with spoken language? They  are independent of spoken languages and follow their own paths of development how are they classified? Home sign, pidgin, creolization what do you mean by the first one? It is a gestural communication system, often invented spontaneously by a deaf child who lacks accessible linguistic input.
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Pidgin [SEP] Introduction
A pidgin , or pidgin language, is a grammatically simplified means of communication that develops between two or more groups that do not have a language in common: typically, its vocabulary and grammar are limited and often drawn from several languages. It is most commonly employed in situations such as trade, or where both groups speak languages different from the language of the country in which they reside (but where there is no common language between the groups). Fundamentally, a pidgin is a simplified means of linguistic communication, as it is constructed impromptu, or by convention, between individuals or groups of people.