Iron-deficiency anemia can cause fatigue (tiredness), shortness of breath, chest pain, and other symptoms. Severe iron-deficiency anemia can lead to heart problems, infections, problems with growth and development in children, and other complications.
Semantics is the study of meaning. It is a wide subject within the general study of language. An understanding of semantics is essential to the study of language acquisition (how language users acquire a sense of meaning, as speakers and writers, listeners and readers) and of language change (how meanings alter over time).
In English grammar, a subject is one of the two main parts of a sentence. (The other main part is the predicate .). The subject is sometimes called the naming part of a sentence or clause. The subject usually appears before the predicate to show (a) what the sentence is about, or (b) who or what performs the action.n English grammar, a subject is one of the two main parts of a sentence. (The other main part is the predicate .). The subject is sometimes called the naming part of a sentence or clause. The subject usually appears before the predicate to show (a) what the sentence is about, or (b) who or what performs the action.