What function is the endocrine system primarily supporting through the glands and hormones

The anterior lobe makes up most of the gland and releases the majority of the hormones. The smaller posterior lobe stores hormones but does not make them. It links the endocrine system with the nervous system by way of the hypothalamus. The pituitary gland is known as the 'master' endocrine gland.

Here is a small google passage i found i hope this helps

are there any letter choices to this or is this an open ended question?

you may having too much sleep.. a good night sleep consists of about 7 hours. more than that could be the reason you're still tired throughout the day.