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 a passive sentence, the agent is not the subject. In fact, sometimes a passive sentence will not contain an agent. The subject of a sentence is the person, place, thing, or idea that is doing or being something.You can find the subject of a sentence if you can find the verb. Ask the question, Who or what 'verbs' or 'verbed'? and the answer to that question is the subject.he subject of a sentence is the person, place, thing, or idea that is doing or being something. You can find the subject of a sentence if you can find the verb.