Activation of sebaceous glands is associated with which developmental phase?

The correct answer is - puberty.

Explanation:

Sebaceous glands are the exocrine glands present in mammals that are microscopic glands, produce an oily substance, Sebum, lubricates the skin and hair follicles.

Activation of these glands is triggered twice in the developmental stage or phase, neonatal (0 to three months from birth) but the major activation of these glands when puberty hits an individual. It produces 500 percent of its normal production during the puberty phase.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.