Réponse :
a) The best season are summer and spring in January, February, March, December
b)You can:
1) Take a ferry ride to Manly.
2) Stroll through the Royal Botanic Gardens.
3) Visit the Opera House.
4) Taste the atmosphere of the Rocks district.
5) Witness the migration of humpback whales.
6) Discover Aboriginal art at the Art Gallery of NSW.
7) Take to the height of the Sydney Tower.
I searched it on Google
c)With the many activities on offer in Centennial Park, it is the ideal place to enjoy a sunny day: jogging, picnicking, barbecue, stroll, sports field and even rent bicycles or rollerblades and go horse riding.
d)Here are the best attraction you can do to get the best views:
West Head Lookout
Pylon Lookout at Sydney Harbour Bridge
Observatory Hill
Dawes Point Park
Bald Hill Lookout
d) I would rather go to Centennial Park because i love Parks and i love to enjoy the day in the nature by picknicking and doing some barbecues with some friends and to chill out there, at least it's not dangerous.
Explications :