Compare and contrast the systems of government in Australia and New Zealand.

I'm no expert on governments but the basic differences are:

New Zealand's government has a single house, equivalent to the British House of Commons or the Australian House of Representatives. There is no Upper House to balance the Lower House so any political party that attains power in this house will be able to pass whatever laws they choose

Australia is a Federated Commonwealth of States, with each state having their own government for local state issues (health, education, police, infrastructure), and a Federal Government that manages Federal affairs (foreign affairs, taxation, immigration, defence, national finances, etc). The Federal Government has two houses, the lower house is the aforementioned House of Representatives, and the upper house is the Senate. The lower house tends to be where laws are created and the Senate must then ratify these laws before they become the law of the land. Refusal to pass a law on two consecutive occasions can trigger the dissolution of both houses and an election.

The Australian state of Queensland has a similar arrangement to New Zealand and it has resulted in various governments abusing their power due to the lack of an upper house to check that power. Luckily terms of just 3 years ensures that any government who does this will feel voters revenge come the next election before they have done too much damage (hopefully).

Best of luck,

-Squeak