Question

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only correct answer​

Answer 1

• Sounds are produced by vibrating objects.

• The time Taken by an object to complete one oscillation is called time period.

•LED glows even when a weak electric current passes through it.

• Chloroplast is present only in plant cells.

$\mathtt \purple{Hope \: \: it \: \: helps ♡}$

Answer 2

Answer:

answers are

1. no . vibrating objects
2. no . time period
3. no .weak electric current
4. no . cell wall ,plastids ,and a central vacuole structures

May this will help you