Questions

"The moon smiled at me" is the example of personification in the given options.

Personification is a technique in which we give objects human traits like emotions, gestures, speech,... by using metaphor. 

Here moon is an object which cannot smile but using metaphor sense, we gave that sense to it.

Nucleus serves as the control center for cell metabolism and reproduction.

Sigmoid colon or pelvic colon is a curved, S-shaped portion of the large intestine which is closest to the rectum and anus.

* It helps to transports fecal matter from the descending colon to the rectum and anus.

* It is the final segment of the colon.

I am black gold i.e charcoal. It is black when it is not used and when using it is red due to fire and when used it is in grey color as it becomes ash. 

Vikram Sarabhai Space Centre is located at Thiruvananthapuram, Kerala.

• This is the lead centre of ISRO responsible for the design and development of launch vehicle technology focusing on rocket and space vehicles for India's satellite programme.

Galton's whistle is also called as Dogs whistle or silent whistle, is a type of whistle that emits sound in the ultrasonic range, which people cannot hear but some other animals can, including dogs and domestic cats, and is used in their training.