AWARDING BRAINLIEST Why are liquids usually difficult to compress?

a.

Their atoms are held in position

c.

Liquids have a definite shape

b.

Their atoms are already packed closely together

d.

Liquids are not difficult to compress

Ibelieve it's temperature! i'm not 100% sure.

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.

Heat of fusion= heat/mass  heat of fusion = 12.03kj/36 g= 0.3342 kj/g or 334.2 j/g