Over all your images lack the pop, sizzle, crack of what I would expect to see in a models portfolio.
One of your stronger images but it has room for improvement
Looking at the eyes, do they look as sharp as they should be
Was too wide a lens used that makes the nose appear larger then life
Since this is for a models portfolio, a vertical orientation for a portrait in the norm
Hair not perfectly under control, fly always and bending at shoulders, should be a gentle cascade
Great smile and beautiful brown eyes
The bright sky is a distraction, and really does not need to be in photo, could start top of photo at the sand
Like the fact you are showing your athletic ability
Great smile again
Try not to loose feet and hands when being photographed
[If you show the elbow include the hands, if the knees are there include the feet]
Think if you reversed which knee is up and included your feet the mage would be stronger
Go to the agencies web site for model and photo requirements
Wish you success!