Either add the passage with the question so we know what you are referring to or do not post questions like these. Not everybody has read what you have. This question is completely useless and unanswerable without the story to go off of.
Answer:
can i just take the points?
Answer: A tachometer measures the speed at which engine runs.
Explanation:
- In the first blank space there should be a verb - measures and the second blank space is referring to what is measured, that is the speed.
A tachometer or revolution-counter is measuring the rotation speed and it is an instrument. The speed is shown on the display.
- ''Tachometer'' is the word that is considering Greek words such as tachos which means speed in Greek and metron which means measure. It is device used in automotive world and the other vehicles that has speed and speed measuring.
By referring to them as "his mother and his father" the reader can feel more close to the character. When saying "the mother and the father" one can relate less, feel distance between one and those parents. On the other hand, when saying "his mother and his father" the reader feels a little more close to the situation, feels deeper the relationship and can ever reflect him or herself in the character.