This is the 1936th most frequent Japanese word.
開
"開" means "open" or "to open."
In this sentence, '開けます' is the polite verb form of '開ける', used in the context of physically opening an object, such as a window.
私は毎朝窓を開けます。
I open the window every morning.
Here, '開かれる' is the passive form of '開く', used metaphorically to indicate the initiation or availability of opportunities.
新しい可能性が開かれる。
New possibilities are opened.
'開く' in this example describes an object (the door) opening by itself, using the intransitive form of the verb.