Please help me with my science! Only 2 questionss!

1. H

2. C

Explanation:

for #1 I chose H because mass doesn't change

for #2 I chose C because the longer arrow is greater force while the smaller is less force. The weaker force pushes the object down but the greater force would push greater. For A, the object wouldn't move. For B and D, the object would move down.

G

Explanation:

As the mass increases, the force increases to move it.

The asian oyster was introduced to replace depleted native fish populations - Intentional release

European brown trout were introduced to establish sport fisheries - Intentional release

European green crabs began threatening commercial fisheries - Unintentional release

Cogon grass arrived as seeds in packing material - Unintentional release