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).
Identifying Simple Subjects The simple subject is the noun or pronoun in the complete subject that tells what the sentence is talking about. The other words in the complete subject modify the simple subject. Examples of Simple Subjects - The steep steel ladder has become slippery. [Ladder is the simple subject; the steep steel ladder is the complete subject.] - The woman in blue overalls climbs slowly and carefully.