Which organs are responsible for producing fluid to give sperm nourishment and motility?
a)vas deferens
b)testes
c)seminal vesicles
d)prostate glands

The right option is; c) seminal vesicles

Seminal vesicles are two enlarged sac like organs and part of the male genitourinary system. Seminal vesicles are situated under the urinary bladder, above the prostate gland, and within the pelvis. Seminal vesicles perform an important role in male fertility. The main function of the seminal vesicles is to both secrete, and store fluid that will later become semen. Most of this fluid is released during ejaculation to provide an environment that is essential for the proper functioning, and survival of sperm.

The seminal vesicles contain semen or seminal fluid, which contains certain essential elements for the spermatozoa survival and also helps in their movement.  

Further explanation:

A pair of glands that are present in the pelvis of the male and are responsible for the production of semen is known as seminal vesicle or glands. It is estimated that out of a total, 70% of the semen volume is provided by this vesicle. Prostatic secretions and testicular spermatozoa produce the remaining 30% of the semen.

These vesicles are present as the long tubular structure of 5cm and are found between the rectum and the bladder fundus. The seminal vesicle consists of three layers. The inner moist layer functions to make the semen. The middle and the outer layer are made up of smooth muscle tissue and connective tissue, respectively.

The vesicle combines with vas deferens to form a duct called ejaculatory duct, which helps in draining the substances into the urethra. During ejaculation, the middle layer contracts and results in the release of the seminal fluid into the duct.

The fluid from the seminal gland contains the following elements:

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Answer Details:

Grade: College Biology

Chapter: Reproduction

Subject: Biology

Keywords:

Seminal vesicles, seminal gland, semen, seminal fluid, spermatozoa, sperm, rectum, bladder fundus, smooth muscle tissue, connective tissue, vas deferens, ejaculatory duct, urethra, fructose, alkaline fluid, prostaglandins.

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

credit: gradman555p98x9p

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c. establishing proper sleep hygiene