Marta is the subject of the sentence because she is performing the verb "Planned"
<span>The question says,'which of the following statement contains an example of an explanation. The correct option is A. All the other given options are just pure statements, but option A, which is talking about thermostat, take time to explain what a thermostat is. It explains that the thermostat is an instrument which control the temperature in the house.</span><span />
An idea intended to make the reader take notice and want to read on is called a hook
